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Mineralpedia Details for Sterryite

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Sterryite

Sterryite

Named for Thomas Sterry Hunt, the very first mineralogist with the Geological Survey of Canada in Ottawa. Found at its type locality near Madoc in Ontario, Canada as a hydrothermal mineral in marble, Sterryite is also purportedly found in Russia as well. Sterryite is associated with veenite and guettardite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/sterryite.pdf

Formula
(Ag,Cu)2Pb10(Sb,As)12S29 
Crystal System
Orthorhombic 
Crystal Habit
Plumose 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
black 
Streak
metallic 
Class
Orthorhombic - Dipyramidal 
Hardness
3.5 
WebMineral
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Mindat
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Sterryite from Taylor pit, Madoc, Ontario, Canada

Sterryite
            from Taylor pit, Madoc, Ontario, Canada

Extremely rare lead sulfantimonide thus far found in one worldwide locality, the Taylor pit at Madoc in Ontario. The locality, which by all accounts is exhausted (Mindat) also yielded nine new species including veenite and guettardite. This specimen contains very visible elongated, fibrous bundles or thin lamellae to 3mm in hydrothermally altered marble.

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