actinolite defined in 1939 year

actinolite - Actinolite (Gr. aktis, ray; lilhos, stone);
actinolite - Natural silicate of calcium, magnesium, and iron. A member of the group of mono-clinic amphiboles, it contains no alumina and is green in colour. It occurs in fibrous aggregates, or elongated crystals, and is a common constituent of crystalline schists and thermally metamorphosed rocks.

near actinolite in Knolik

letter "A"
start from "AC"

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