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Edgarite: FeNb2S6
Comments: Silvery metallic edgarite crystal to about 0.3mm embedded between pegmatite grains. Location: Khibiny Massif, Kola Peninsula, Murmanskaja Oblast, Northern Region, Russia. Scale: Picture size 2 mm. © Tom Loomis / Dakota Matrix
Comments: Scanning electron micro-image edgarite (EDG, fibrous appearing) inclusion in pyrrhotite (PY) with marcasite (MRC, slightly lower reflectance) in silicate matrix (SIL, lowest reflectance). Location: Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species