from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A monoclinic beryllium aluminium hydroxide silicate mineral, a product of the decomposition of beryl in pegmatites.
from the GNU version of the Collaborative International Dictionary of English
- n. A brittle gem occurring in light green, transparent crystals, affording a brilliant clinodiagonal cleavage. It is a silicate of alumina and glucina.
from The Century Dictionary and Cyclopedia
- n. A very brittle mineral of a pale-green color and high luster, crystallizing in prismatic crystals belonging to the monoclinic system.
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