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cassiterite n. 錫石 錫石 cassiterite n 1: a hard heavy dark mineral that is the chief source of tin Cassiterite \Cas*sit"er*ite\, n. [Gr. ? tin.] (Min.)
Native tin dioxide; tin stone; a mineral occurring in tetragonal crystals of reddish brown color, and brilliant adamantine luster; also massive, sometimes in compact forms with concentric fibrous structure resembling wood ({wood tin}), also in rolled fragments or pebbly ({Stream tin}). It is the chief source of metallic tin. See {Black tin}, under {Black}. [1913 Webster]
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