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Crystalline gemstone
Answer for the clue "Crystalline gemstone ", 6 letters:
spinel
Alternative clues for the word spinel
Word definitions for spinel in dictionaries
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.
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.
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Spinel \Spin"el\, n. Bleached yarn in making the linen tape called inkle; unwrought inkle. --Knight.