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A hard heavy dark mineral that is the chief source of tin
Answer for the clue "A hard heavy dark mineral that is the chief source of tin ", 11 letters:
cassiterite
Word definitions for cassiterite in dictionaries
WordNet
Word definitions in WordNet
n. a hard heavy dark mineral that is the chief source of tin
Wiktionary
Word definitions in Wiktionary
n. (context mineral English) A generally black mineral, composed of tin oxide, SnO 2 , which is an important ore of tin.
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
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 ...
Wikipedia
Word definitions in Wikipedia
Cassiterite is a tin oxide mineral , SnO . It is generally opaque , but it is translucent in thin crystals. Its luster and multiple crystal faces produce a desirable gem. Cassiterite has been the chief tin ore throughout ancient history and remains the ...
Usage examples of cassiterite.
It was a little like the black stuff of cassiterite, so-called tin stone, but then cassiterite with that formation was peculiar to regions around St.