HISTORY, NAME, LOCALITIES: Various varieties of actinolite have been known since antiquity. Its name is derived from the Greek aktino, meaning “ray,” alluding to its radiating crystal habit. Occurrences are widespread with important sources in the United States (Vermont,...
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HISTORY, NAME, LOCALITIES: Mineralogists recognized adamite as a distinct species in 1866 and named for French mineralogist Gilbert-Joseph Adam, who provided the type specimens. Adamite is an uncommon mineral with few collecting localities, the most notable being in France,...
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HISTORY, NAME, LOCALITIES: Mineralogists first discovered aegirine, pronounced AGE-er-een, in Norway in the 1790s and recognized it as a distinct mineral species in 1835. Its name is derived from Ægir, the Norse god of the seas and all sea...
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