The Preferred Supply Strategy, is a world first in the coloured gemstone industry. It involves appointing ‘Sightholders’, from the world's leading gemstone houses and jewellery manufacturers.

A commitment to supporting an ethical route to market and an interest in growing the market as a whole, are prerequisites for appointment.

Sightholders are chosen for their focus on Tanzanite, their ability to make a long-term commitment, their distribution capabilities, their understanding of the need for vertical integration and their operational standards of integrity.

TanzaniteOne has initially appointed ten Sightholders, with plans to increase this number in the medium term. These initial ten are listed below:


Royal Touch is manufacturer and  wholesaler of gem stones with offices located in in New York, Hong Kong and Arusha . Additionally, the companies also has a state of the art manufacturing facility which is located in Jaipur, India. Royal Touch has carved a niche for its fine cut Tanzanites in both calibrated sizes, as well as in free sizes from 1 to 250 carat stones.  Royal Touch also specializes in matched pairs, and fine suites of gemstones. Known for its fine cutting & timely execution of orders, Royal Touch is a preferred Tanzanite vendor of leading companies world over.

  Address: Royal Touch, 15 West 47th Street , 600 New York, NY 10036. USA
Tel: +1 212 421 2121
Fax: +1 212 319 6349
Toll Free:  
Director: Vivek Khandelwal
E mail:

Shree Narayan Global Shree Narayan Creation Doing Tanzanite Business Since 1995 , and specialise in all kind of shape and sizes .

  Address: 674 Khandaka Mansion , 2nd Floor Bordi Ka Rasta , Kishanpole Bazar. Jaipur – 302001 ( india )
Tel: ( 141 ) 4013936, 3293773
Toll Free:  
CEO: Alok Saraff
E mail:

Emerald House & ( is a jeweller based in Jaipur, India. They have been in business for more than three decades. It is a family business and everyone has substantial experience in the colored gem stone business. L.L. Tambi & Co. specialise in Tanzanite and Emeralds. Its main operations involve importing rough stones, and then cutting and polishing them. The company exports mainly to the United States, Hong Kong, Thailand, Japan, United Arab Emirates and Israel. They have outlets worldwide.

K. L. Tambi & Co. and its senior partner Mr JP Tambi, have twice been awarded the highest export award from the government of India. Mr Tambi is also an International Colored Stone Association (I.C.A.) member and was the President of The Jewelers Association, Jaipur for the last four years.

Address: Unit 1111A, 11th Floor, Hunghom Commercial Centre A, 37-39 Ma Tau Wai Road, Hunghom Kowloon, Hong Kong
Tel: 852 2367 3581
Fax: 852 2367 3582
Contact Person Ratnesh Tambi
CEO: JP Tambi
E mail: ,

Gems Trading Co. ( is a vertically integrated company that has interests in both rough and polished Tanzanite. The core competency of the business lies in fine cutting/ polishing stones and in creating the latest designs in jewellery.
The company’s key offices are located in New York, Hong Kong, Thailand, Jaipur and Arusha. Green Creations and GTC jewellery are sister concerns, located in New York and Hong Kong respectively. Colorjewels' pursuit of ethical business practices for over two decades has driven growth and brand recognition.

Address: Colorjewels, Suite 704, 2 West 46 th Street, New York, NY 10036 USA
Tel: +1 212 764 2823
Fax: +1 212 354 8488
Director Mr. Ashish Dangyach
CEO: Om Prakash Dangayach
E mail:

Paul Wild.

E mail:  

The KGK Group ( is a global corporation based in India, with fully integrated operations in Diamonds, Jewellery and Colored Gemstones. Double De Beers Sightholders, KGK is known worldwide for its exemplary quality, international standards and impeccable reputation for customer service.

From procurement to manufacturing and marketing, KGK is present across the entire value chain of the industry with offices all over the world.

Present Management
KGK Group is headed by Mr. Navrattan Kothari, who is the Group Chairman. Each division of the group is headed by senior members of the Kothari family who have wide ranging experience in the industry.

The Gemstones side of the business is managed by Mr. Vinay Kothari and Mr. Prakash Kothari, while we associate with Mr. Rajesh Daga for business relating to Tanzanite. Diamonds and Jewellery business is under the supervision of Mr. Sanjay Kothari, Mr. Sandeep Kothari, Mr. Prashant Kothari and Mr. Vinamra Kothari.

KGK is a reputed and trusted name in the business having being in operation for over a century.


G-97 sez phase-2 sitapura industrial area, Tonk road Jaipur 302022 INDIA

Unit 501, 5/F, Tower 2, Harbour Centre, 8 Hok Cheung Street, Hunghom, Kowloon, Hong Kong

Tel: +91 141 2570288,2771817. Mobil no 91 9928005201


+91 141 4012778



Mr Rajesh Daga

2301, M.B.S Ka Rasta, 1st Crossing, Johari Bazar, Jaipur -302003,

+91 99280 05201, 0141 2570288



2301, M.B.S Ka Rasta, 1st Crossing, Johari Bazar, Jaipur -302003,

+91 99280 05201, 0141 2570288

CEO: Mr. Prashant Kothari
E mail:

Rare Multicolor Gems bears the reputation of being cutters of the finest quality gemstones. With offices stretching from Jaipur, India to the USA, Europe, Hong Kong and Bangkok, this operator has a reputation for unwavering commitment to service and strict adherence to quality.

The company has been in the gemstone business for the last 35 years, with its presence in New York spanning twenty of those years. Key clientele hail from the U.S.A and Caribbean where people are famous for the quality of their Tanzanite, Emeralds, Rubies and Sapphires.

Address: Rare Multicolor Gems, Suite 1505, 2 West 46th Street, New York, NY 10036 USA
Tel: +1 212 869 7855
Fax: +1 212 869 7236
CEO: Ram Khatoria
E mail:

STS Jewels ( is one of the world's largest manufacturers and distributors of Tanzanite jewellery. Within a relatively short span of 20 years, STS now ranks amongst the world's largest, fully integrated jewellery operations in the colored gemstone industry. Being one of the world's first few companies to commercially promote Tanzanite, STS Jewels is proud of its contribution to the growth of this market. 

Today STS Jewels has over 2 000 employees working in various locations in Asia, Europe and the USA. Their activities include gemstone cutting and retail jewellery sales.

STS believes in maintaining operational standards of the highest integrity and diligently works to help the Tanzanite market grow ethically and efficiently.

Address: STS Jewels Inc. 42 West 48th Street, Suite 1600, New York, NY 10036 USA
Tel: +1 646-688-5559
Fax: +1 646-688-4826
Address: STS Jewels Inc. 100 Michael Angelo Way, Suite 400D, Austin, TX 78728 USA
Tel: +1 512-852-7080
Fax: +1 512-852-7097/98
CEO: Sunil Agrawal
E mail:

AG Gems ( p ) Ltd

  Address: 305, Arihant Tower, Agara Road, Jaipur, Rajasthan - (India)
Tel: +91 -141 -2606796
Fax: +91 141 -2600417
CEO: Arun Kumar Gokhroo
E mail:

Shrey International

  Address: Room 615A, 6/F, Blk A, Focal Ind Ctr No. 21 Man Lok Street Hung Hom Kowloon, Hong Kong
Tel: 852 21807475
Fax: 852 30116225
CEO: Dharmendra Mutha
E mail: