I.G.A.T. Diamonds
- Israeli manufacturer of loose diamonds. Features Phoenix diamonds.
- http://www.igatdiamonds.com

Penta Diamonds
- Manufacturers and wholesalers of loose fancy shaped diamonds including marquise, oval, heart and pear shapes.
- http://www.penta-diamonds.com

Lazare Diamond
- Manufacturer of Lazar brand name ideal cut diamonds. Provides jeweler locator.
- http://www.lazarediamonds.com

Sarin Technologies
- Manufactures tools for optimisation and grading of rough and polished diamonds.
- http://www.sarin.com

Ernest Slotar, Inc.
- Importing and contract manufacturing company, specializing in ideal cut and fancy shape diamonds. Sell to trade only
- http://www.cutbygauge.com

EightStar Diamond Company
- Manufacturer of Eightstar diamonds featured high optical symmetry.
- http://www.eightstar.com

Waldman Diamond Company,
- Diamond manufacturer, buyers and sellers.
- http://www.wdcgroup.com/

Smolensk State Unitary Company Production Corporation
- Diamond polishing company providing "Russian cut" or the "Russian make" stones between 0.01 and 7.00 carats in weight and include various colours and purities.
- http://www.kristallsmolensk.com/