GEMSTONE FACTS - AwesomeGems.com - Blue Ceylon Sapphire Burma Ruby Colombian Emerald Russian Alexand
Gem Facts - AwesomeGems.com ... The GIA type Color Scale: The 3 charts below are based on the GIA (Gemological Institute of America) "Color Stone Grading System", where the Color with it's various Hues, the Tone, and the Saturation of color in a particula...