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Comments: Massive specimen of dark algodonite with vuggy areas filled with minute crystals.
Location: Algodones Mines, Coquímbo Province, Chile.
Scale: 4x3x3 cm.
© John Betts - Fine Minerals
Algodonite: Cu6As Koutekite: Cu5As2
Comments: Silvery metallic koutekite with darker gray algodonite.
Location: Mohawk Mine, Keweenaw County, Michigan, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species