Natural Diamonds | Diamond Stone – GIA C
WEBAbout Diamond. Diamond forms under high temperature and pressure conditions that exist only about 100 miles beneath the earth’s surface. Diamond’s carbon atoms are bonded in essentially the same way in all directions. Another mineral, graphite, also contains only carbon, but its formation process and crystal structure are very different.
Gemological Institute Of America | All About Gemstones - GIA
WEBEstablished in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.
GIA - Report Check
WEBGIA reports represent the highest standard of reliability, consistency and integrity. And now, GIA Report Check is available for all GIA reports, providing you with an additional level of assurance. With Report Check, you can quickly and conveniently confirm that the information on your report matches what is archived in the GIA report database.
GIA - Report Check
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Diamond Description
WEBDiamond’s characteristic chemical composition and crystal structure make it a unique member of the mineral kingdom. Diamond is the only gem made of a single element: It is typically about 99.95 percent carbon. The other 0.05 percent can include one or more trace elements, which are atoms that aren’t part of the diamond’s essential chemistry.
Alexandrite Gemstone | Natural Alexandrite Stone - GIA
WEBAbout Alexandrite. Often described by gem aficionados as “emerald by day, ruby by night,” alexandrite is the very rare color-change variety of the mineral chrysoberyl. Originally discovered in Russia’s Ural Mountains in the 1830s, it’s now found in Sri Lanka, East Africa, and Brazil, but fine material is exceptionally rare and valuable.
What Is Jade Gemstone | Jade Stone – GIA
WEBAbout Jade. Jade has its cultural roots in the smoke-dimmed caves and huts that sheltered prehistoric humans. Around the world, Stone Age workers shaped this toughest of gems into weapons, tools, ornaments, and ritual objects. Their carvings invoked the powers of heaven and earth and mystic forces of life and death. Jade Description.
Opal Gemstone | Opal Stone - GIA
WEBAbout Opal. Because opal has the colors of other gems, the Romans thought it was the most precious and powerful of all. The Bedouins believed that opals contained lightning and fell from the sky during thunderstorms. When Australia’s mines began to produce opals commercially in the 1890s, it quickly became the world’s primary source for ...
GIA Gem Encyclopedia | Complete List Of Gemstones
WEBGIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional detailed gemological information, a buyer’s guide, photos, videos & research. Green in sunlight. Red in lamplight. Color-changing alexandrite is nature’s magic trick.
Ruby Gemstone | Ruby Stone - GIA
WEBAbout Ruby. Rubies can command the highest per-carat price of any colored stone. This makes ruby one of the most important gems in the colored stone market. In its purest form, the mineral corundum is colorless. Trace elements that become part of the mineral’s crystal structure cause variations in its color. Chromium is the trace element that ...
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