(via The Canadian Gemmologist, Vol.III, No.4, Spring, 1982) . Usually I am green or greenish blue, sometimes yellow, and all too often white or grayish. They call me Bonamite sometimes when I am greenish blue. Not many gemstones have zinc in them, but I do. My R.I is 1.62 – 1.85, and I am heavier than garnet. What am I?
Answer: Smithsonite
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