Amstel
One of the oldest diamond factories of Amsterdam, has been producing gems since 1876. (Denmark)

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)

Oro
Italian manufacturers and distributor of diamond jewelry.

Goodfine Diamond Corp.
New York manufacturer of fine diamonds.

Sirius Diamonds Ltd.
Manufacturer of Canadian Polar Bear diamonds. Specializes in "Canadian Ideal" and "Canadian Fine Cut" diamonds.

River Diamonds & Jewels Co. Ltd
Indian manufacturer, trader, and exporter of cut and polished diamonds, gemstones and jewellery

Spence Diamonds
Chain of canadian diamond and jewelry retail stores.

Antwerp Blanka Diamonds
Manufacturer of small brilliants with factories in Antwerp and Sri Lanka.

Bapalal & Co. Jewellers.
Indian manufacturer of gold and diamond set jewellery.

Elsa
Manufactures custom wedding and engagement rings. Does business with retailers as well as the general public

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.

Canada Diamonds
Diamond brokers offer wholesale Canadian diamonds and platinum jewelry.

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

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.

Xquisite Jewels
Manufacturer of diamond and gold jewelry based in India. Includes contact information, and examples of items as well as estimated prices.

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