Hypertext Webster Gateway: "petalite"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Petalite \Pet"al*ite\, n. [Cf. F. p['e]talite.] (Min.)
A rare mineral, occurring crystallized and in cleavable
masses, usually white, or nearly so, in color. It is a
silicate of aluminia and lithia.
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