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Peridot, Pakistan. green gem stone

Peridot from Sappat, Kohistan, Pakistan. Peridot (/ˈpɛrɨdoʊ/ or /ˈpɛrɨdɒt/) is gem-quality olivine. Olivine is a silicate mineral with formula of (Mg, As peridot is the magnesium-rich variety (forsterite) the formula approaches Wikipedia