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hedenbergite

American  
[hed-n-ber-gahyt] / ˈhɛd n bərˌgaɪt /

noun

  1. a contact metamorphic mineral of the pyroxene family, calcium ferrous silicate, CaFe(SiO3 ) 2 , that forms black prismatic crystals in crystalline limestone.

Etymology

Origin of hedenbergite

1815–25; named after L. Hedenberg, early 19th-century Swedish chemist; see -ite 1

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.