• JADE

    Jade is actually two separate gems: nephrite and jadeite. In China, a pierced jade disk is a symbol of heaven.

     

    • 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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