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beryllonite

[buh-ril-uh-nahyt] /bəˈrɪl əˌnaɪt/
noun
1.
a mineral, sodium beryllium phosphate, NaBePO 4 , occurring in colorless or light-yellow crystals, sometimes used as a gemstone.
Origin
1885-1890
1885-90; < Greek bērýll(i)on (bḗryll(os) beryl + -ion diminutive suffix) + -ite1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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