vɪd noun Mineralogy.
a sodium-rich amphibole, occurring in green to black crystals in alkalic rocks.
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Encyclopedia Britannica
Encyclopedia
arfvedsonite
amphibole mineral, an iron-rich sodium silicate. Lithium and magnesium replace iron in the structure to form eckermannite. Both minerals characteristically occur as dark-green crystals in alkali igneous rocks and their associated pegmatites. For chemical formula and detailed physical properties, see amphibole (table)
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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Arfvedsonite
is always a great word to know.
So is callithumpian. Does it mean:
| a chattering or flighty, light-headed person. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
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