Pollucite
Pronunciation : Pol"lu*cite
Part of Speech : n.
Etymology : [See Pollux, and 4th Castor.] (Min.)
Definition : Defn: A colorless transparent mineral, resembling quartz, occurring with castor or castorite on the island of Elba. It is a silicate of alumina and c?sia. Called also pollux.
Source : Webster's Unabridged Dictionary, 1913