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.
My GIA
WEBMy Laboratory & GIA Laboratory Client Portal. Now featuring one log in for My Laboratory and the GIA Client Portal. Maintain your laboratory account information and grading results online. You can manage your team members and provide access to My Laboratory, update payment preferences, view open balances and create shipping memos.Also, view and manage the status of your items being graded at a ...
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 Quality Factors | The Color Range of Ruby | GIA
WEBThe Color of Ruby. The mixture of these untreated and heat-treated rubies show a range of darker and brighter red colors. Photo: Robert Weldon/GIA. Courtesy: Tommy Wu, Shire Trading Ltd., Hong Kong. Color is the most significant factor affecting a ruby’s value. The finest ruby has a pure, vibrant red to slightly purplish red color.
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.
Sapphire Quality Factors | Different Types & Colors of Sapphire - GIA
WEBIn general, the more intense and uniform the color is, the more valuable the stone. Sapphires that are not blue are known as fancy sapphires, and may be any color—except red (which is a ruby). The fancy sapphire colors are: pink, orange, yellow, green, purple, and violet. There truly is a different color of sapphire to suit anyone’s taste!
Garnet Gemstone | Garnet Stone - GIA
WEBAbout Garnet. Red garnets have a long history, but modern gem buyers can pick from a rich palette of garnet colors: greens, oranges, pinkish oranges, deeply saturated purplish reds, and even some blues. Red garnet is one of the most common and widespread of gems. But not all garnets are as abundant as the red ones.
Natural Diamonds | Diamond Stone – GIA C
WEBGIA has been grading laboratory-grown diamonds since 2007. Beginning July 1, 2019, GIA Laboratory-Grown Diamond Reports and identification reports no longer use the term “synthetic.”. The GIA Laboratory-Grown Diamond Report includes the standard GIA color, clarity and cut grading scales for reference purposes.
Aquamarine Gemstone | Aquamarine Stone - GIA
WEBColor is an important quality factor for aquamarine. Aquamarine is pastel blue, greenish blue, or green-blue. The preferred aquamarine color is a dark blue to slightly greenish blue with moderate intensity and is most striking in gems of over 5-cts. Fine stones show even blue color with no zoning. View Gallery.