Gemstones: Facts, photos, and information for over 100 gems.
Articles about gemstones written by a GIA Graduate Gemologist. Each article includes photos and information about the gem''s phyiscal properties and geologic origin. ... Chatoyant Gems look like the eye of a cat. They have a line of light that moves across the gem. ... Helenite is a manmade glass produced by fusing ash from the 1980 Mount St ...