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  1. 2.74 Ct. Octagon Natural Gem Bi Color Tourmaline Unheated

    Price:  $384.44

    Product ID: 807230421
    Product Name: Tourmaline
    Price : $384.44
    Weight: 2.74
    Jewelry Size: 9.9 x 6 x 4.4 Mm
    Shape: Octagon
    Color: Bi Color
    Clarity: VVS
    Luster: Good
    Origin: Nigeria
    Treatment: Unheated
    Crystal Structure: Trigonal
    Hardness: 7 - 7.5
    Specific Gravity: 3.0+
    Refractive Index: 1.62 - 1.68
    Chemical: Na(Li,Al)3Al6(B03)3 Si6O18(OH)4
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