castorite

noun

cas·​tor·​ite

ˈkastəˌrīt,

-ˈaa-,

-ˈai-,

-ˈȧ-

variants or castor

-tə(r) 

plural -s

: a mineral consisting of a variety of petalite occurring in transparent crystal

Word History

Etymology

castorite from German kastor (from Kastor mythological personage, from Latin Castor) + English -ite; castor from German kastor; from its appearance with pollucite (previously called pollux)

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