All facts and figures taken from the GIA


Jade is actually two separate gems: nephrite and jadeite. In China, a pierced jade disk is a symbol of heaven. Jade has its cultural roots in the smoke-dimmed caves and huts that sheltered prehistoric humans. Around the world, Stone Age workers shaped this toughest of gems into weapons, tools, ornaments, and ritual objects. Their carvings invoked the powers of heaven and earth and mystic forces of life and death.

MINERAL: Jadeite and Nephrite
CHEMISTRY: NaAlSi2O6 and Ca2(Mg,Fe)5Si8O22(OH)2
COLOR: Green, white, orange, yellow, lavender, black
REFRACTIVE INDEX: 1.666 to 1.680 (+/-0.008) and 1.606 to 1.632 (+0.009, 0.006)
BIREFRINGENCE: Usually not detectable
SPECIFIC GRAVITY: 3.34 and 2.95
MOHS HARDNESS: 6.5 to 7 and 6.0 to 6.5

Jade is the official gem for the 12th anniversary.