Q - What is Vedic Gemology ?
A - It is the union of two sciences, Gemology and Astrology and it postulates that the Nine Primary Gems correspond to the Nine Revolving Heavens.
The seven primary colors of the spectrum, VIBGYOR and the two secondary colors, infra-red and ultra-violet, correspond to the nine planets.
Here we give the correspondence between Cosmic Colors, planets and gems.
Color Planet Gem
Red Sun Ruby
Orange Moon Pearl
Light Blue Jupiter Yellow Sapphire
Ultra-Violet Rahu Hessonite
Green Mercury Emerald
Indigo Venus Diamond
Infra-red Ketu Cat's Eye
Violet Saturn Blue Sapphire
Yellow Mars Coral
Manikyam Dinanayakasya, Vimalam Muktaphalam Sheetagau
Mahedrasya cha Vidrumam, Marathakam Soumyasya Garutmakam