cummingtonite


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cummingtonite

(ˈkʌmɪŋtəˌnaɪt)
n
an amphibole mineral, magnesium iron silicate hydroxide, found in metamorphic rocks
References in periodicals archive ?
Dominant primary manganese minerals include spessartine, tephroite, rhodonite, pyroxmangite, neotocite, bementite, Mn-rich cummingtonite, rhodochrosite and Mn-rich apatite (Pires, 1977, 1983).
Cummingtonite occurs as an accessory mineral in granodiorite in the district.
with Cummingtonite, forms a series with Ferro-anthophyllite, Amphibole group, Can.