Tourmaline and Tanzanite Pendant Quartz Its formula is Cu6Si6O18·6H2O (also Holiday Gifts Pyrite in a Quart 8
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Tourmaline and Tanzanite Pendant Quartz Its formula is Cu6Si6O18·6H2O (also Holiday Gifts Pyrite in a Quart 8 Its formula is Cu6Si6O18·6H2O (also reported as CuSiO2(OH)2) Vibrant blue pentagonite crystals in matrix from Maharashtra