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benitoite

[buh-nee-toh-ahyt] /bəˈni toʊˌaɪt/
noun
1.
a rare mineral, barium titanium silicate, BaTiSi 3 O 9 , occurring in blue hexagonal crystals exhibiting dichroism.
Origin
1905-1910
1905-10; named after San Benito County, California; see -ite1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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