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Gemstone (precious or semi-precious stone) ... From Wikipedia, the free encyclopediaA gemstone or gem (also called a precious or semi-precious stone) is a piece of attractive mineral, which—when cut and polished—is used to make jewelry or other adornments. However certain rocks, (such as lapis-lazuli) and organic materials (such as amber or jet) are not minerals, but are still used for jewelry, and are therefore often considered to be gemstones as well. Most gemstones are hard, but some soft minerals are used in jewelry because of their lustre or other physical properties that have aesthetic value. Rarity is another characteristic that lends value to a gemstone. Apart from jewelry, from earliest antiquity until the 19th century engraved gems and hardstone carvings such as cups were major luxury art forms; the carvings of Carl Fabergé were the last significant works in this tradition. Gem Stone Minerals (Other Nonmetals Mining and Quarrying Companies) ... Found on 1800miti.Com, the Commerce DirectoryGem Stone Minerals ... This Industry comprises establishments primarily engaged in developing the mine site, mining and/or milling or otherwise beneficiating (i.e., preparing) nonmetallic gem stone minerals. - American Benefits Group - exploring, developing and marketing saphires, emeralds and other gemstones.
- Archangel Diamond Corporation - diamond mining and exploration company.
- Crystal Company, The - exporter of rough semi-precious stones and minerals to polishers, cutters, hobbyists, jewellers, and beaders carvers.
- De Beers Group - offers diamond exploration, mining, recovery, valuation, and marketing.
- Debswana Diamond Company - diamond mining operation owned in equal shares by the government of the Republic of Botswana and De Beers.
- Diamond Fields International - exploration and mining of diamonds in Namibia and South Africa.
- Firestone Diamonds plc - international diamond mining and exploration company with operations in South Africa and Botswana.
- GGL Diamond Corp.
- Inner Mongolia XL Abrasives Processing Co.,Ltd - We are one of main manufacturer and exporters located in the capital city of Inner Mongolia Autonomous Region - Huhhot in North of China. We have been specialized in the line of abrasives, specialized in Garnet Sand & Cut-off discs for years. Our garnet is very suitable for SandBlasting, Waterjet cutting and water fitration etc usage.
- Namdeb Diamond Corporation - owned by the government of the Republic of Namibia and De Beers Centenary AG.
- Orissa Mining Corporation - State owned mining corporation, producing iron, chrome ores, manganese, granite, and gems. India
- Rex Diamond Mining Corporation - active in exploration, development, mining, polishing, and jewelry design.
- SouthernEra Resources Limited - diamond exploration and mining company with principal interests in diamonds and platinum group metals (PGMs) in South Africa, Angola, and Canada.
- Trivalence Mining Corporation - progressive junior mining company based in Vancouver, British Columbia. The company is focused on becoming an intermediate producer of rough gem quality diamonds.
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