Definition of hiddenite in English:

hiddenite

Pronunciation /ˈhidnˌīt/ /ˈhɪdnˌaɪt/

noun

  • A rare green gem variety of spodumene.

    ‘It is well known as a common constituent of what appear to be alpine-cleft-type pockets that locally contain emerald and spodumene (the variety hiddenite) in Alexander County.’
    • ‘This type of pegmatite, or one closely allied to it, also contains hiddenite as hypidiomorphic crystals within the pegmatite itself.’

Origin

Late 19th century named after William E. Hidden (1832–1918), American mineralogist.