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  1. Bi Color Tourmaline 2.32 Ct. Octagon Shape 15.9 x 4.6 Mm. Natural Gem Nigeria

    Price:  $174.35

    Product ID: 807237822
    Product Name: Tourmaline
    Price : $174.35
    Weight: 2.32
    Jewelry Size: 15.9 x 4.6 x 3 Mm
    Shape: Octagon
    Color: Bi Color
    Clarity: SI
    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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