( n. )
A glassy colorless mineral occurring in rhombohedral crystals, sometimes used as a gem. It is a silicate of glucina, and receives its name from its deceptive similarity to quartz.
( n. )
A glassy colorless mineral occurring in rhombohedral crystals, sometimes used as a gem. It is a silicate of glucina, and receives its name from its deceptive similarity to quartz.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012