ABOUT JADE
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.
BIRTHSTONES & ANNIVERSARIES
Jade is the official gem for the 12th anniversary.
CONFUCIUS
The philosopher wrote that jade is like virtue and its brightness represents heaven.
BI
The traditional jade flat disc with a hole in the middle, known as a “bi,” symbolizes heaven.
YU
The character for jade is one of the oldest in written Chinese, dating to 2950 BC.
FACTS
- 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
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