General Information:
Chemical Formula:Ag3Pb3Bi9S18 to Ag3Pb6Bi7S18
Composition:(Molecular Weight = 2,985.26 gm)Silver 10.84 %
AgBismuth 49.00 %
BiLead 20.82 %
PbSulfur 19.33 %
S Empirical Formula: Ag3Pb3Bi7S18
Locality:Treasury lode, Geneva district, Park Co., Colorado, USA.
Name Origin:Named for J. H. L. Schirmer, superintendent of the U. S. Mint, Denver, Colorado, USA.
Physical Properties: Cleavage:None
Color:lead gray, gray, or iron black.
Density:6.74
Diaphaniety:Opaque
Habits:Massive - Granular - Common texture observed in granite and other igneous rock., ,
Hardness:2 - Gypsum
Luminescence:Non-fluorescent.
Luster:Metallic
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