GIA’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 …

Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.

Screen for tourmaline, kunzite, morganite and other gems and minerals by sifting through material from the mine’s commercial operation. Jeep tours of active mining areas are also available.

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Provides a comprehensive summary of the special optical effects in gemstones, including opalescence, chatoyancy, asterism, schiller, and iridescence, and investigates the submicron …

Eye-popping specimens are on display at the revitalized and newly-reopened Mignone Halls of Gems and Minerals at the American Museum of Natural History in New York City.

Nov 14, 2013 · Dedicated to the earth sciences, it houses one of the world’s largest gem and mineral collections, including such world-famous gems as the Hope diamond, Logan sapphire, …

Mar 17, 2017 · The glaciated peaks of the Arctic region set the stage for our gemstone quest − in an area that occupies less than 8 percent of Earth’s surface (from Greenland to Northern …

Emerald Spanish conquistadors, Inca kings, and pharaohs treasured this rich green gem. See an emerald cross from a sunken ship!

Nov 18, 2019 · Arizona’s scenic desert and mountain landscape is the perfect backdrop for a modern Wild West road trip ‒ and researching mines for a road trip to gem localities there …