SPINEL
Spinel
Spinel is the magnesium aluminium member of the larger spinel group of minerals. It has the formula MgAl2O4. Balas ruby is an old name for a rose-tinted variety.The above text is a snippet from Wikipedia: Spinel
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spinel
Noun
- Any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours.
- Any crystalline material, not necessarily an oxide, that possesses the same crystal structure as this mineral.
- Bleached yarn in making the linen tape called inkle; unwrought inkle.
The above text is a snippet from Wiktionary: spinel
and as such is available under the Creative Commons Attribution/Share-Alike License.