General Information:
Chemical Formula:Pb4Ag3Bi5S13
Composition:(Molecular Weight = 20815.77 gm)Silver 12.96 %
AgBismuth 41.16 %
BiLead 29.86 %
PbSulfur 16.02 %
S Empirical Formula: Ag25Pb30Bi41S104
IMA Status:Approved IMA 1977
Locality:Old Lout mine, Ouray, Colorado. USA.
Name Origin:Named for the locality.
Physical Properties: Color:gray.
Density:7.11
Diaphaniety:Opaque
Habits:Microscopic Crystals - Crystals visible only with microscopes., Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).,
Hardness:2 - Gypsum
Luster:Metallic
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