thaumasite

noun

thau·​ma·​site

ˈthȯməˌsīt

plural -s

: a white mineral Ca₄Al₆Si₆O₂₄(SO₄,CO₃,Cl₂) consisting of a basic silicate, carbonate, and sulfate of calcium (hardness 3.5, specific gravity 1.88)

Word History

Etymology

International Scientific Vocabulary thaumas- (from Greek thaumasios wondrous, from thauma miracle, wonder) + -ite

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