Kyanite
Formula: Al2(SiO4)O Colour: Blue, white, light gray, green, rarely yellow, orange, pink Lustre: Vitreous, Sub-Vitreous, Greasy, Pearly Hardness: 5½ – 7 Specific Gravity: 3.53 – 3.67 Crystal System: Triclinic
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This product has multiple variants. The options may be chosen on the product page
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