GIA Gem Encyclopedia | Complete List Of Gemstones
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 information, a buyer’s guide, photos, videos & research.
Birthstones | Birthstone by Month | GIA
Birthstones | Birthstone by Month | GIA
Pricing Guides for Gemstones - GIA
A list of diamond and gemstone pricing guides to help you learn about gem and jewelry values.
Gemological Institute Of America | All About Gemstones - GIA
Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services. Gem Encyclopedia Birthstones
Wedding Anniversary Gemstone List: Years One through 10 - GIA …
2016年6月21日 · If you’re at a loss for wedding anniversary gift ideas, the world of gemstones offers infinite inspiration and meaning. Use this wedding anniversary gemstone list to find the perfect gift for every year of the first 10 years of your marriage. Giving a bejeweled wedding anniversary gift is a storied tradition.
View All Gems - Gem Kids - Gemological Institute of America
What are Gems? Inclusions; Phenomena; Gemology; gem explorer; Pearls; Gem Cutting
Chart: Inclusions in Natural, Synthetic, and Treated Emerald
2014年7月25日 · Over the past 50 years, the observation of inclusions in colored gemstones, particularly emerald, has become an essential foundation for identification, quality analysis, and origin determination. This chart contains a selection of photomicrographs of natural, synthetic, and treated emeralds.
Gemology – GIA Store
The GIA store provides the instruments, gemological research from Gems & Gemology and point-of-sale retailer support materials needed to help your business and continue your education.
Sapphire Gemstone | Sapphire Stone - GIA
Sapphire is the birthstone for September and the gem of the 5th and 45th anniversaries. Kashmir Intensely saturated and velvety, rare sapphires from Kashmir set the standard for blue.
Aquamarine Gemstone | Aquamarine Stone - GIA
Aquamarine is available in large sizes—many fine gems of 25-cts or greater are readily available. Generally, smaller accent sizes are pale: cut gems are more likely to have a darker color if they are larger than five carats.