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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 other notable sale was a rare antique Renaissance Revival suite of sapphire, demantoid garnet and enamel jewelry attributed to Louis Comfort Tiffany for Tiffany & Co Tiffany & Co., circa 1920.

From Forbes

The hardness is only 6.5, or lower even than that of quartz—a character rather adverse to the use of demantoid as a gem.

The green garnet that is called "olivine" in the trade also approaches diamond in luster, hence the name "demantoid," or diamond like, sometimes applied to it.

It sits within a scrolling frame suspending a flexible swag, accented by circular and oval-cut demantoid garnets and sapphires, highlighted by enamel floral sprays and suspended from a chain of floral links.

From Forbes

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

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