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beryllonite

American  
[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.


Etymology

Origin of beryllonite

1885–90; < Greek bērýll ( i ) on ( bḗryll ( os ) beryl + -ion diminutive suffix) + -ite 1