Amstel  
   One of the oldest diamond factories of Amsterdam, has been producing gems since 1876. (Denmark)
   http://www.amsteldiamonds.nl/

The Diamond Broker  
   In business since 1979, an extension of two diamond cutting facilities one located in Lisbon, Portugal, and the other domestically in the United States. (Los Altos, California)
   http://www.diamondbroker.com/

Oro  
   Italian manufacturers and distributor of diamond jewelry.
   http://oro-gioielli.com/

Goodfine Diamond Corp.  
   New York manufacturer of fine diamonds.
   http://www.goodfinediamond.com/

Sirius Diamonds Ltd.  
   Manufacturer of Canadian Polar Bear diamonds. Specializes in "Canadian Ideal" and "Canadian Fine Cut" diamonds.
   http://www.siriusdiamonds.com

River Diamonds & Jewels Co. Ltd  
   Indian manufacturer, trader, and exporter of cut and polished diamonds, gemstones and jewellery
   http://www.riverdiamonds.com

Spence Diamonds  
   Chain of canadian diamond and jewelry retail stores.
   http://www.spencediamonds.com/

Antwerp Blanka Diamonds  
   Manufacturer of small brilliants with factories in Antwerp and Sri Lanka.
   http://www.blankadiamonds.be

Bapalal & Co. Jewellers.  
   Indian manufacturer of gold and diamond set jewellery.
   http://www.bapalaljewellers.com/

Elsa  
   Manufactures custom wedding and engagement rings. Does business with retailers as well as the general public
   http://www.elsarings.com/

Apollo Diamond  
   Produces single crystal diamond wafers and crystals for the optoelectronics, nanotechnology, and consumer gem markets. Includes information on synthetic production capabilities, with links to patent and related articles.
   http://www.apollodiamond.com/

Canada Diamonds  
   Diamond brokers offer wholesale Canadian diamonds and platinum jewelry.
   http://www.canadadiamonds.com/

ISSO Diamonds & Jewellery  
   A manufacturer of real cut and polished diamonds, precious and semi-precious gem stones, plain and studded gold jewelry and silverware.
   http://www.issodiamondsjewellery.com/

Leo Schachter Diamonds LLC  
   Provides a guide to buying diamonds that addresses cut, clarity, color and carat as well as branded and unbranded diamonds. Site highlights the difference between Leo Diamonds and unbranded diamonds.
   http://www.theleodiamond.com/

Charles & Colvard Ltd  
   Develops colorless, lab-created moissanite gemstones which are substitutes for diamonds. (Nasdaq: CTHR).
   http://www.moissanite.com/