- Amstel - One of the oldest diamond factories of Amsterdam, has been producing gems since 1876. (Denmark)
www.amsteldiamonds.nl
- Oro - Italian manufacturers and distributor of diamond jewelry.
oro-gioielli.com
- 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)
www.diamondbroker.com
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