cassiterite


From The Collaborative International Dictionary of English v.0.48:

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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