Definitions
from The Century Dictionary.
- noun A titano-silicate of iron, manganese, sodium, and potassium, occurring in black prismatic crystals. It is found in southern Greenland.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
black silicate mineral with chemical formula KNa2Li(Fe2+,Mn2+)2Ti2Si8O24
Etymologies
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Examples
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Diamond - macrodiamonds and microdiamonds Ruby, sapphire, jadeite, eclogite, blueschist Emerald, red beryl Benitoite, neptunite & other gemstones
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