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coesite

[koh-sahyt]
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noun Mineralogy.
  1. a rare form of silicon dioxide, a denser polymorph of quartz, originally synthesized from quartz at high temperatures and pressures: later discovered in nature.
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Compare stishovite.

Origin of coesite

1950–55; named after Loring Coes, Jr., 20th-century American who synthesized it; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018