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Mineral used as a gem
Answer for the clue "Mineral used as a gem ", 6 letters:
spinel
Alternative clues for the word spinel
Word definitions for spinel in dictionaries
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Spinel \Spi*nel"\, Spinelle \Spi*nelle"\, n. [F. spinelle, or LL. spinellus, perhaps from L. spina a thorn, a prickle, in allusion to its pointed crystals.] (Min.) A mineral occuring in octahedrons of great hardness and various colors, as red, green, blue, ...
Wiktionary
Word definitions in Wiktionary
n. (context mineralogy English) Any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours.