castorite
Cas"tor, Cas"tor*ite, n. Etym: [The minerals castor and pollux were so named because found together on the island of Elba. See Castor and Pollux.] (Min.) Defn: A variety of the mineral called petalite, from Elba.
Cas"tor, Cas"tor*ite, n. Etym: [The minerals castor and pollux were so named because found together on the island of Elba. See Castor and Pollux.] (Min.) Defn: A variety of the mineral called petalite, from Elba.