January 25, 2016

INTRODUCTION
Over the past 35 years, Shenzhen has transformed from an extremely poor
fishing village to one of the most economically developed cities in
China, witnessing countless advances along the way. In May of 1980, the
city was designated one of China’s first special economic zones, acting
as a cradle for many start-ups. Today, it is China’s biggest jewelry
manufacturing and trading hub.
Over the years, Shenzhen has been at the forefront of pioneering trade reform. The “China Jewelry Index” (CJI) was initiated, born, and maintained in Shenzhen. It was launched in October, 2014, after three years of preparation. The Index, like Rapaport’s diamond report, was the first national-level database to provide comprehensive information on China’s gem and jewelry industry. Considered a milestone of business development, CJI is fully supported by the local Shenzhen government, with intellectual support from the Gem and Jewelry Trade Association of China.
Over the years, Shenzhen has been at the forefront of pioneering trade reform. The “China Jewelry Index” (CJI) was initiated, born, and maintained in Shenzhen. It was launched in October, 2014, after three years of preparation. The Index, like Rapaport’s diamond report, was the first national-level database to provide comprehensive information on China’s gem and jewelry industry. Considered a milestone of business development, CJI is fully supported by the local Shenzhen government, with intellectual support from the Gem and Jewelry Trade Association of China.

Shenzhen is located at the southern tip of the Pearl River Delta, bordering Hong Kong.

Fast economic growth boosts Shenzhen’s gem and jewelry industry. Its well-established
trading centers include large-scale operations such as the Kingliving International Jewelry
Exchange Center. Courtesy China Gems Magazine.
trading centers include large-scale operations such as the Kingliving International Jewelry
Exchange Center. Courtesy China Gems Magazine.
The city’s GDP rose from 1.96 million Chinese renminbi (RMB) in 1979 to
1,600.20 billion RMB (US $267 billion) in 2013. The growth rate in
Gross Domestic Product was 8.8 percent from 2013 to 2014, which was
higher than the overall growth rate for all of China. This fast growth
attracted new migrants from all over the country and the world. The
permanent population grew from 30,000 in the early 1980s to about 18
million today. Its demographic consists of 99 percent migrants, although
the exact population has never been consistent or easy to count.

As the industry has developed, many gem and jewelry testing labs have opened offices in
Shenzhen. This building is the National Gem and Jewelry Testing Center in Shuibei,
Shenzhen. Courtesy China Gems Magazine.
Shenzhen. This building is the National Gem and Jewelry Testing Center in Shuibei,
Shenzhen. Courtesy China Gems Magazine.
Besides being home to numerous high-tech companies, the Shenzhen Stock
Exchange, and the world’s third-busiest container port, Shenzhen is also
at the forefront of China’s gem and jewelry industry. There are more
than 3,600 registered jewelry companies, more than 5,000 licensed
individual dealers, and 29 gem and jewelry exchange centers in Shenzhen.
The industry employs more than 150,000 people. The value of total
wholesale jewelry production and the total domestic jewelry retail sales
in Shenzhen reached 100 billion RMB (about US $16.7 billion) and 140
billion RMB (about $23.3 billion) respectively in 2014.
In 2013, a group from GIA visited China to research the Chinese industry and market. During that visit, the team observed many of Shenzhen’s leading companies.
In 2013, a group from GIA visited China to research the Chinese industry and market. During that visit, the team observed many of Shenzhen’s leading companies.
HISTORY OF SHENZHEN’S GEM AND JEWELRY INDUSTRY
The beginning of Shenzhen’s gem and jewelry industry dates back to the
early 1980s, when Hong Kong jewelry manufacturers started moving their
factories and plants to mainland China. In addition to its ideal
location as a neighbor of Hong Kong, Shenzhen’s development was also
facilitated when the government started a trial of new gold-trading
policy in the city. Before that, between 1949 and 1982, it was required
that all gold production be submitted to the central bank, which then
distributed the gold to factories. Also, individual consumers were not
allowed to purchase gold. The first stage in the opening up of the gold
trade was to allow individuals to purchase gold jewelry in state-owned
shopping malls.

Since China opened its gold market to
individuals, gold jewelry has been a best seller among all jewelry
categories. Photo by Andrew Lucas/GIA, courtesy Batar Jewelry.
In the 1980s, Shenzhen’s gem and jewelry industry was very small-scale.
The main business model was called “three-plus-one,” a custom
manufacturing arrangement that used supplied materials, designs, and
samples, and—for compensation (the “plus”)—manufactured the desired
product. Many industries adopted this model at the beginning of the
reform process.

The gem and jewelry industry in Shenzhen began
with jewelry manufacturing, which is still one of the city’s pillar
industries. Courtesy Shenzhen Yuehao Jewelry.
The industry experienced its fastest growth between the end of the
1980s and the early 2000s. During that time, gem and jewelry trading
policy became more and more flexible and private businesses grew
rapidly. Consumers had more and more disposable income to spend on
luxury products like jewelry. Shenzhen Gold and Jewelry Association
formed in 1990, with support from the local government, to serve as a
bridge between government and business owners.

More and more Chinese consumers are spending
their disposable income on luxury goods such as jewelry. The fast growth
of the Shenzhen gem and jewelry industry is aided by an increase in
discretionary income. Photo by Andrew Lucas/GIA, courtesy Enzo.
After 2003, the government further reformed its taxation policies in
order to support the developing gem and jewelry industry. The formation
of gold and diamond exchanges stimulated the fast growth of the industry
in multiple areas all over the country. In Shenzhen, larger jewelry
companies quickly expanded, and brand building took over as the core
mission. In addition to being a manufacturing and trade center, Shenzhen
is also home to most major Chinese jewelry brands.
In 2005, several jewelry brands originating in Shenzhen were named “China Famous Brand.” This labeling helped them with brand promotion and sales, and caused many industry participants to realize the importance of brand building. Today, the leading brand in every sector of the gem and jewelry industry has operations in Shenzhen.
In 2005, several jewelry brands originating in Shenzhen were named “China Famous Brand.” This labeling helped them with brand promotion and sales, and caused many industry participants to realize the importance of brand building. Today, the leading brand in every sector of the gem and jewelry industry has operations in Shenzhen.

Branding became important to Chinese jewelry companies in the mid-2000s. Jewelry by
Enzo, a leading colored stone jewelry brand, is modeled by Chinese movie star Sun Ning.
Courtesy China Gems Magazine.
Enzo, a leading colored stone jewelry brand, is modeled by Chinese movie star Sun Ning.
Courtesy China Gems Magazine.
SHUIBEI: A CENTER OF SHENZHEN’S GEM AND JEWELRY INDUSTRY
Shuibei Jewelry Park covers an area of less than one square kilometer,
but it is the center of Shenzhen’s gem and jewelry industry,
encompassing more than 2,000 jewelry companies. Many companies
originated there as small studios and became leading industry brands.
Most of the area’s gem and jewelry exchange centers are clustered there
as well. Gem-testing labs and industry services such as packaging,
transport, and storage also have offices in the area.

Shuibei is the center of Shenzhen’s gem and
jewelry industry. There are over 2,000 jewelry businesses clustered
there. Courtesy China Gems Magazine.
The GIA team visited two large exchange centers and the largest
high-end jewelry club, managed by Shenzhen Creation Group. The Creation
Group is one of the leading colored stone companies in Shenzhen. It
formed in 2000 and operates a group of companies engaged in high-end and
commercial jewelry design and manufacturing, and in gemstone and
jewelry trading.

There are more than 100 jewelry shops in the
Shuibei International Jewelry Trade Center. It has four main sectors,
including a jadeite jade section. Photo by Eric Welch/GIA, courtesy The
Creation Group.
The Shuibei International Jewelry Trade Center opened in May, 2004. It
was the first centralized jewelry trading platform in Shuibei. Before
that, people who wanted to buy wholesale gemstones and jewelry needed to
go from one shop to another. This center provided the first one-stop
service for large and small wholesalers and retailers.

Karat-gold jewelry is very popular in the China
market. This display promotes the Yuehao jewelry brand, which has a
store in the Shuibei International Jewelry Trade Center. Photo by Eric
Welch/GIA, courtesy of The Creation Group.
The Shuibei International Jewelry Trade Center currently hosts more
than 100 notable local and international jewelry shops. There are four
main sectors: brands, jadeite jade, and karat gold and silver jewelry.
The company evaluates all dealers at the end of each year. Contract
renewals are based on many evaluation factors, including consumer
satisfaction. Only qualified dealers can operate their shops or booths
in the center.
The company also invests in displays designed to educate consumers and reassure them about the center’s reliability. This is especially important today since more and more trading platforms are being built and to be sustainable, owners have to make their facilities stand out.
The company also invests in displays designed to educate consumers and reassure them about the center’s reliability. This is especially important today since more and more trading platforms are being built and to be sustainable, owners have to make their facilities stand out.

Shops in the exchange centers usually carry gold,
jade, colored stone, and diamond jewelry. Wholesalers and retailers can
easily find what they want. Photo by Eric Welch/GIA, courtesy The
Creation Group.
The Royalland Jewelry Club was formed in 2009 to cater to the emerging
high-end jewelry market. It is the largest high-end jewelry club in
mainland China, with a showroom that’s more than 21,500 square feet in
size. The showroom is located on the top floor of a building and has its
own private access. The club regularly hosts jewelry salons for its
clients and is also available for private events. Independent designers
contract with the club to develop custom designs for luxury consumers.

Royalland Jewelry Club Gallery
BATAR: CHINA’S LARGEST GOLD JEWELRY MANUFACTURER
Gold jewelry has a long tradition as a best-seller in China. Batar
provides manufacturing services for almost all major gold jewelry brands
and produces one out of five gold jewelry pieces in China. The company
was registered in Hong Kong in 2001 and is now a member of the Shanghai
Gold Exchange.
In addition to gold jewelry manufacturing, Batar also deals in other gold products and in gold inheritance and investment. Batar has more than 20 subsidiaries, and sold nearly 200 tons of gold products in 2014. The company is now the main supplier of 24K gold jewelry for more than 30,000 retailers and more than 400 brand names.
In addition to gold jewelry manufacturing, Batar also deals in other gold products and in gold inheritance and investment. Batar has more than 20 subsidiaries, and sold nearly 200 tons of gold products in 2014. The company is now the main supplier of 24K gold jewelry for more than 30,000 retailers and more than 400 brand names.

Twenty-four karat gold jewelry is still the most
popular wedding jewelry in China. This suite has a traditional dragon
and phoenix theme. Photo by Andrew Lucas/GIA, courtesy Batar Jewelry.
Twenty-four karat gold jewelry is favored by Chinese consumers, who
feel that the purer the better when it comes to gold. This is unlike
other world markets in the world. Asian consumers, including those in
the Middle East, are generally gold lovers, but the highest gold purity
commonly found in those markets is 22K (91.6 percent gold).

The Batar store is always packed with gold
jewelry shoppers. The Chinese people have a never-ending passion for
high-purity gold jewelry. Photo by Andrew Lucas/GIA, courtesy Batar
Jewelry.
It is Chinese tradition to purchase gold jewelry as gifts for important
life events. At the beginning of each lunar year, consumers buy all
kinds of gold bars or decorations with designs featuring that year’s
zodiac animal. Every holiday, stores that carry gold jewelry are packed
with wealthy families and entrepreneurs who buy large gold decorative
items to show off their success. Also, increasing numbers of individual
consumers invest their increasing discretionary income in gold and
gemstones. Batar took advantage of this opportunity by collaborating
with banks to facilitate their gold investment programs.

Batar is the main supplier for gold jewelry
retailers from all over the country. Each transaction usually involves
large amounts of gold jewelry, which explains the need for these baskets
to hold the selected goods. Photo by Andrew Lucas/GIA, courtesy Batar
Jewelry.
When GIA visited a Batar store in Shenzhen on a regular business day,
the store was crowded with clients. Based on the quantity of goods they
were purchasing, it was easy to tell that most of them were wholesalers
and retailers. Large quantities of gold jewelry were collected in
baskets during the transactions, and the salespeople and buyers were
busy counting and selecting items.

Batar employs the top wax carvers in the
industry, and they pay a lot of attention to detail. This carver is
working on the original wax model for a gold ornamental object. Photo by
Andrew Lucas/GIA, courtesy Batar Jewelry.
Batar started as a manufacturer for jewelry brands outside of China.
When the domestic Chinese gold market opened up, the company became the
main manufacturer for domestic jewelry brands as well. Later, Batar
developed its own brands, including Batar Jewelry and Show King. The
company has contracts with well-known jewelry designers and never stops
inventing new techniques and designs.

Batar is a major manufacturer of gold jewelry and ornamental objects. Photo by Andrew Lucas/GIA, courtesy Batar Jewelry.
To satisfy the demand for high-purity gold jewelry, the company
invested in developing new gold jewelry manufacturing techniques in
collaboration with China Science Academy. As all goldsmiths know,
soldering is one of most important steps in making gold jewelry, but the
standard solder used in China contains only 91.6 percent gold, giving
it a lower melting temperature than pure gold. In order to significantly
improve the purity of gold items, they must use 24K material throughout
the process and also try to avoid as many soldering steps as possible.
This is the key technique that Batar uses to stay competitive.
To cater to young consumers, Batar developed techniques to make gold
jewelry reflect different colors of light. While the result is popular
with young consumers, the older generation still prefers the traditional
designs and pays more attention to the value of the material than to
its unique appearance.
A recent market survey indicated that of all 24K jewelry, chains—necklaces and bracelets—are the best sellers. Sales of gold chains account for 40 percent of the market, with rings at 17 percent and pendants at 11 percent.
A recent market survey indicated that of all 24K jewelry, chains—necklaces and bracelets—are the best sellers. Sales of gold chains account for 40 percent of the market, with rings at 17 percent and pendants at 11 percent.
Batar manufactures massive quantities of 24K gold jewelry and ornamental objects.
XINGGUANGDA: ONE OF CHINA’S LARGEST GEM SETTERS
The recipient of the 2014 JNA Manufacturer of the Year award for
gem-set jewelry, Shenzhen’s Xingguangda Jewelry Industrial Co. Ltd., is
one of the leading jewelry manufacturers in mainland China. The company
was formed in 1997 and specializes in gemstone jewelry in 18-karat gold
and platinum. In addition, Xingguangda also engages in jewelry design,
manufacturing technique research, and jewelry wholesale and retail.

Xingguangda is one of China’s leading jewelry
manufacturers. Its gem-setting techniques are very well known throughout
the industry. This worker is making the final adjustments on a high-end
diamond jewelry suite. Courtesy Xingguangda Jewelry.
After more than 20 years of operation, Xingguangda now owns four
well-known jewelry brands, more than 50 patents, and more than 3,000
retail outlets countrywide. Working closely with the China Gem and
Jewelry Industry Association, the company has been involved in the
formalization of multiple industry standards. Xingguangda had its
origins in Shenzhen, and has built a very solid base in this world-class
industry hub. The company’s core team includes its management staff and
more than 1,000 professional technicians.
Manufacturing in Shenzhen is almost always done on a large scale and
this is no different at Xingguanda, where large quantities of diamonds
are set into the jewelry they produce.
While continually increasing its manufacturing efficiency and product
quality, the company also invests in developing its jewelry design team.
Through the years, Xingguangda has won numerous awards in the National
Jewelry Design and Manufacture competition. In the most recent 2014-2015
competition, several jewelry-making technicians from the company won
individual awards.

Award-winning Jewelry Gallery
Besides its dealings in colored stone jewelry, Xingguangda also
collaborates with diamond-cutting factories to research new creative
cuts. In 2014, they launched a new diamond cut called “ten heart and ten
arrows.” This new cut has 71 facets—more than a regular round
brilliant, which has 58. The manufacturer reports that this cut’s fire
is generally 20 percent stronger than regular round brilliants. Only one
out of 300 pieces of rough is suitable for faceting this new cut and it
takes six times longer to produce than the round brilliant.

Xingguangda Diamond Jewelry Gallery
LORENZO JEWELRY INTERNATIONAL
Lorenzo Jewelry (LJ) International Inc. is the parent company to a
wholesale business, called Lorenzo, and a retail jewelry brand called
Enzo. The company is vertically integrated, with mining interests,
direct purchases from mines, colored gemstone manufacturing, jewelry
design and manufacturing, global wholesale distribution, and retail
sales. LJ International keeps its retail and wholesale businesses
separate by selling wholesale to markets globally and selling retail
through its stores in China.

The establishment of the Enzo retail division in
Mainland China completed LJ International’s full mine-to-market value
chain. Photo by Andrew Lucas/GIA, courtesy LJ International.
The company can trace its origins back to February, 1987, when the
current company Chairman, President, and CEO, Yu Chuan Yih, founded
Lorenzo Jewelry Manufacturing in Hong Kong. Mr. Yih was born in Brazil
and started in the industry as a Brazilian gemstone trader. The
company’s origin was very humble, with just five workers in the original
colored stone cutting factory.
Their first entry into China was in 1990, when they opened a 45,000 square foot colored gemstone cutting factory in Shantou, China. In 1998, they also opened a 50,000 square foot factory in Shenzhen. By 2003, they consolidated the operations into a 100,000 square foot highly modern Shenzhen facility. There, they cut colored gemstones, designed and manufactured jewelry, and conducted all their trading and corporate affairs.
Their first entry into China was in 1990, when they opened a 45,000 square foot colored gemstone cutting factory in Shantou, China. In 1998, they also opened a 50,000 square foot factory in Shenzhen. By 2003, they consolidated the operations into a 100,000 square foot highly modern Shenzhen facility. There, they cut colored gemstones, designed and manufactured jewelry, and conducted all their trading and corporate affairs.

Company founder Yu Chuan Yih has come a long way
from dealing colored stones in Brazil to leading this completely
vertically integrated company. Photo by Andrew Lucas/GIA, courtesy LJ
International.
Their major wholesale markets include the USA, Europe, and Japan, with
70 percent of their sales in the USA. They sell to many major companies,
including QVC, Ben Bridge, Sterling, Helzberg Diamonds, Macy’s,
Walmart, JC Penney, Signet, and Rhein Studios. Their lines include
sterling silver, various karat gold alloys, a variety of colored
gemstones, diamonds, and cultured pearls, as well as synthetic and
imitation gemstones.

At the Hong Kong Gem and Jewellery Fair, the
Lorenzo wholesale division sells loose colored stones and colored stone
jewelry to buyers from around the world. Photo by Andrew Lucas/GIA,
courtesy LJ International.
ENZO RETAIL DIVISION
The first Enzo retail store opened in Shanghai in December, 2004.
Today, Enzo has around 250 stores throughout Greater China, including
mainland China, Hong Kong, and Macau. Enzo has two divisions: the Enzo
chain of retail stores and Enzo Ouro, a new retail concept that serves
super VIP clients with high-end jewelry by appointment. The first Enzo
Ouro store opened in Beijing in 2014. Prices for Enzo Ouro jewelry range
from US$12,500 into the millions.

Enzo Ouro stores and showrooms exude luxury and exclusivity. Photo by Andrew Lucas/GIA, courtesy LJ International.
While known for loose colored gemstones and colored gemstone jewelry,
Enzo also has diamond lines that target the important wedding market in
China, which sees over 13 million marriages annually. Enzo breaks its
diamond line into three price-point ranges, with different diamond
qualities in each. Highest is Enzo 88, then Snowy, and then Cape. Enzo
88 has D to H color, Snowy has G to J color, and Cape has K through M
color. The Cape line has the largest market share of diamond jewelry for
Enzo.
LORENZO MANUFACTURING AND WHOLESALE
GIA visited LJ International’s corporate headquarters in Shenzhen to
observe their manufacturing process. Lorenzo cuts over 100 types of
colored gemstones in their facility. In the warehouse, rough is kept in
25-kilo bags, with more-expensive varieties like tourmaline stored in a
walk-in vault. Lorenzo primarily cuts colored gemstones other than ruby,
sapphire, and emerald, preferring to buy those stones already cut for
use in their finished jewelry.

Rubellite tourmaline is a big seller in China and an important stone for the Enzo retail
chain. Photo courtesy China Gems.
chain. Photo courtesy China Gems.
Lorenzo sources its rough from mines that the company has interests in,
from other mines, or from the open market. All rough goes first to
their office in Hong Kong and is housed in their massive warehouse.
Shenzhen is a free-trade zone, so having the factory there allows the
rough coming through Hong Kong to be declared to Chinese Customs with
stone type, weights, and values listed, then enter China through
Shenzhen and come directly to the Lorenzo factory with no taxes or
duties placed on it.
Lorenzo has an agreement with customs declaring the typical expected amount of weight loss after cutting. The new weights are listed for loose or jewelry-set finished stones, which are exported back to their Hong Kong office for global distribution.
Lorenzo has an agreement with customs declaring the typical expected amount of weight loss after cutting. The new weights are listed for loose or jewelry-set finished stones, which are exported back to their Hong Kong office for global distribution.

Copper-bearing tourmaline from Africa is one of
the gem varieties that Lorenzo brings into Shenzhen. They cut the stones
there for sale on the global market. Photo by Andrew Lucas/GIA,
courtesy LJ International.
This allows Lorenzo and other companies to smoothly import rough
gemstones into China, cut them, set them into jewelry, and export them
to the global market without paying import and export duties. Rough is
brought in by the gram and kilo while cut stones are exported by carat
weight and number of pieces. For gemstones destined for domestic retail
sale in Enzo stores, the company must pay duties that depend on stone
type and whether they’re rough or cut.
Lorenzo has more than 100 types of stones in their inventory room, broken down into three categories by value: Platinum, Gold, and Silver. The Silver level includes agates and other less-expensive aggregate materials; Gold contains facet-grade material like amethyst, citrine, garnet, and blue topaz; and Platinum contains more-expensive facet-grade material like tourmaline (including copper-bearing), imperial topaz, pink topaz, kunzite, and morganite.
Lorenzo has more than 100 types of stones in their inventory room, broken down into three categories by value: Platinum, Gold, and Silver. The Silver level includes agates and other less-expensive aggregate materials; Gold contains facet-grade material like amethyst, citrine, garnet, and blue topaz; and Platinum contains more-expensive facet-grade material like tourmaline (including copper-bearing), imperial topaz, pink topaz, kunzite, and morganite.

Rough is sorted by color, shape, clarity, and
size. Lorenzo uses color master sets as references, so customers can
order material that is reliably consistent. Photo by Andrew Lucas/GIA,
courtesy LJ International.
Their sorting department uses rough masterstones to grade color. They
have six color classifications for each type of gemstone. For example,
the six color grades for citrine range from CS (citrine super
excellent), CE (citrine excellent), and then C1, C2, C3, and C4. The
rough’s final grade is based on color, shape, thickness, and clarity. At
this point and after each manufacturing stage—sawing, preform, and
faceting—the rough is also given a weight yield projection. If the
weights after each stage are less than the projection, they review that
manufacturing stage.
The sawing, also called slicing, stations are set up so the sawing wheel is enclosed, with a viewing screen and an opening for the worker’s hands. This set-up, along with a face mask, vacuum tubes drawing gemstone dust away, and water applied to the rough, minimizes the worker’s exposure to the dust resulting from the sawing process.
The sawing, also called slicing, stations are set up so the sawing wheel is enclosed, with a viewing screen and an opening for the worker’s hands. This set-up, along with a face mask, vacuum tubes drawing gemstone dust away, and water applied to the rough, minimizes the worker’s exposure to the dust resulting from the sawing process.

Most of Lorenzo’s workers who do the sawing and
preforming have over 10 years of experience. Photo by Andrew Lucas/GIA,
courtesy LJ International.
After sawing, the preform stage uses a grinding wheel to shape the
stone. The preform set-up is also designed to minimize workers’ exposure
to gemstone dust. Workers wear masks, and a vacuum tube draws dust away
at each grinding station.
The set-up at the faceting stations uses two lapidaries: one for cutting and the other for polishing. While this system is not unique, the custom-built lapidary machines from Korea were set up in an arrangement designed for left-handed workers. The reason for this is the competitive nature of hiring skilled cutters in Shenzhen. Cutters are often hired away from one manufacturer to another. However, almost all two-lap cutting systems are designed for right-handed workers. By having left-handed machines, Lorenzo minimizes the hiring away of its cutters.
Lorenzo cuts all their copper-bearing tourmaline in a separate section that encompasses all stages: rough sorting, sawing, preforming, and faceting. This confinement to one area makes it possible to secure the expensive material.
The set-up at the faceting stations uses two lapidaries: one for cutting and the other for polishing. While this system is not unique, the custom-built lapidary machines from Korea were set up in an arrangement designed for left-handed workers. The reason for this is the competitive nature of hiring skilled cutters in Shenzhen. Cutters are often hired away from one manufacturer to another. However, almost all two-lap cutting systems are designed for right-handed workers. By having left-handed machines, Lorenzo minimizes the hiring away of its cutters.
Lorenzo cuts all their copper-bearing tourmaline in a separate section that encompasses all stages: rough sorting, sawing, preforming, and faceting. This confinement to one area makes it possible to secure the expensive material.

Lorenzo uses a two-lap faceting system. The lap
on the left is for cutting and the one on the right is for polishing.
Photo by Andrew Lucas/GIA, courtesy LJ International.
THE FINISHED PRODUCT
Lorenzo’s operation covers the entire value chain, from buying and
cutting rough colored gemstones to mounting them in jewelry. They also
have a wholesale export business and domestic retail stores.
Our tour through LJ International’s multi-story Shenzhen headquarters
took us into their jewelry design and manufacturing facilities. Their
designs start out as hand renderings that are scanned and cleaned up
with Microsoft Paint before moving on to the CAD/CAM division. The
digital design file is sent to a Fast Prototyping Machine that creates
the first wax model through a laser printing process that takes six
hours. The wax form is then cast in silver to make a master model.
Lorenzo reports that they have approximately 120,000 metal master models
on hand.

The entire production facility was well
organized, modern, and clean, and emphasized worker safety and health.
Photo by Andrew Lucas/GIA, courtesy LJ International.

At the jewelry-design stage, the model-production
process starts with converting a hand drawing into a computer file. The
file is then sent to a machine that creates a prototype. Photo by
Andrew Lucas/GIA, LJ International.

This worker is attaching wax forms to a tree so
several pieces can be cast at the same time. Photo by Andrew Lucas/GIA,
courtesy LJ International.

Intricate stone setting is performed with the assistance of a microscope. Photo by Andrew Lucas/GIA, courtesy LJ International.
Lorenzo’s mass-production areas start with stone sorting, quality
control, and stone matching for jewelry. Their diamond melee sorters
move at an amazing speed, louping a stone about every second. Colored
stones are matched to master sets so customers can confidently order
additional material in the future and know they will receive the same
consistent qualities.

Cut stones are graded against a master set,
quality-inspected, and matched for jewelry. Photo by Andrew Lucas/GIA,
courtesy LJ International.
The production process involves selecting the mold needed from the
company’s rubber mold library and then moving through wax injection,
removing the wax from the rubber mold, preparing the wax for casting,
casting the piece, preparing the jewelry for stone setting, setting the
stones, final polish, and final quality control. Some casting is done
with stones like diamond, sapphire, and ruby already set in the wax.

Diamonds will be placed in this wax model to be
cast in place, eliminating the need for a gem-setting step. Photo by
Andrew Lucas/GIA, courtesy LJ International.
Step inside Lorenzo’s massive gem vault and learn the intricacies of
import and export for gem materials in China as well as How Lorenzo
clasifies and stores their gem material.
CONCLUSION
Our visit to Shenzhen, with stops at the Shuibei International Jewelry
Trade Center, The Royalland Jewelry Club, Batar Jewelry, Xingguangda
Jewelry, and LJ International, provided us with an important overview of
that modern, bustling city’s dynamic jewelry industry. Because of the
vertically integrated nature of its businesses, we also gained important
information about the general structure of the Chinese gem and jewelry
industry.
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