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What other gems are in pumice?

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asked Feb 8, 2018 by Vicki (120 points)

1 Answer

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The formation of pumice prohibit its development of large crystals or any significant gemstones. Though very small crystals of several minerals do occur in pumice, such as feldspars, augite, hornblende, and zircon. But the zircon is extremely minute and would not be able to be considered gem material.
answered Apr 30, 2018 by hershel (52,700 points)