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demantoid

[ dih-man-toid ]

noun

, Mineralogy.
  1. a brilliant green variety of andradite garnet, used as a gem.


demantoid

/ dɪˈmæntɔɪd /

noun

  1. a bright green variety of andradite garnet
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of demantoid1

1890–95; < German, equivalent to (obsolete) Demant diamond (< Middle High German diemant < Old French diamant ) + -oid -oid
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Word History and Origins

Origin of demantoid1

C19: from German, from obsolete Demant diamond, from Old French diamant + -oid
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Example Sentences

The luster, too, is diamond-like as the name "demantoid" signifies.

Green garnets are of two kinds, the calcium-iron garnet, known as demantoid, and the calcium-chromium garnet known as uvarovite.

The demantoid garnet (sometimes called "olivine" in the trade).

The demantoid garnet is also very soft as compared with emerald (61⁄2 as against nearly 8).

As was explained under garnet, jewelers frequently use the term "olivine" to designate demantoid garnet.

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