- Colored Stone Magazine - features information for gemstone professionals.
- Dad's Rock Shop - serving the lapidary hobby, gem, and jewelry trades.
- GemData - search the databases from worldwide suppliers for gemstones, diamonds and cutting rough and see gems listed with retail/wholesale prices.
- National Gemstones - dealers in fine diamonds, precious stones, and collector gems.
- Facet Shoppe - offers rough, cut, and set gemstones as well as faceting information for beginners and faceting-related computer programs.
- Gemstone World - mine direct source for African and world gemstones.
- Magic Loupe and Diamond Tester - tests for Moissanite, Russian Fake Diamonds, CZs, diamonds, White Sapphires and GGG's.
- GemWorld - provide opals, gemstones, collector stones, synthetics, cabbing and faceting rough, lapidary equipment and supplies.
- FacetGems - offers facet rough, cabochon rough, loose gemstones, lapidary equipment, and supplies.
- GemEx Systems, Inc. - developers of an Imaging Spectrophotometer for the analysis of color in gemstones of all types.
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