(via The Canadian Gemmologist, Vol.III, No.4, Spring, 1982) Strongly pleochroic, with an R.I of 1.66 – 1.68, I can be green, yellow, or lilac colored, and occasionally a very beautiful and rare emerald green. Monoclinic with deeply etched crystals, I often have rutile needles in me, and am indeed sometimes mined more for my rutile than for my merit of my own. What a let down. What am I?
Answer: Spodumene
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