50.70 Grams Swiss Blue Raw Topaz for Faceting October Birthstones Product Details:

Product Details:

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50.70 Grams Swiss Blue Raw Topaz for Faceting October Birthstones Product Details:50. 70 grams Facet grade Swiss Blue Raw Topaz for cutting. Clarity of stones have eye clean to loupe clean. Stone: Swiss Blue Topaz Sizes : 50. 70 grams Average: 6. 5 grams per piece Clarity: Eye Clean to Loupe Clean Treatment: Heated Origin: Brazil Technical Analysis of Swiss Blue Raw Topaz Material Characteristics Species: Topaz (AlSiO(F,OH)) Hardness: 8 on Mohs scale Specific Gravity: 3. 49 3. 57 Crystal System: Orthorhombic Refractive Index: 1.