Definition of hyalite in English:

hyalite

noun

mass noun
  • A translucent, colourless variety of opal.

    • ‘This hyalite fluoresces bright green in short wave U.V. likely indicating the presence of small amounts of uranium salts.’

Origin

Late 18th century: from Greek hualos ‘glass’ + -ite.

Pronunciation

hyalite

/ˈhʌɪəlʌɪt/