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    ZIRCON

    Zircon is a colorful gem with high refraction and fire that’s unfairly confused with cubic zirconia.

    • Mineral: Zircon
    • Chemistry: ZrSiO4
    • Color: Blue, red, yellow, orange, brown, green
    • Refractive index:
    • High: 1.925 to 1.984 (+/- 0.040)
    • Medium: 1.875 to 1.905 (+/- 0.030)
    • Low: 1.810 to 1.815 (+/-0.030)
    • Birefringence: 0.000 to 0.059 (low to high)
    • Specific gravity: 3.90 to 4.73
    • Mohs Hardness: 6 to 7.5 (low to high)
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    ZIRCON

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