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Ruby ___ (gem)
Answer for the clue "Ruby ___ (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, ...
WordNet
Word definitions in WordNet
n. a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones
Wikipedia
Word definitions in Wikipedia
Spinel is the magnesium aluminium member of the larger spinel group of minerals. It has the formula MgAlO in the cubic crystal system . Its name comes from Latin "spina" (arrow). Balas ruby is an old name for a rose-tinted variety.