Geocronite

geocronite

tetrahedrite

ankerite

miargyrite

Images
Formula: Pb₁₄(Sb,As)₆S₂₃
Sulpharsenite, jordanite homologous series group, forms a series with jordanite
Crystal System: Monoclinic
Specific gravity: 6.46 measured
Hardness: 2½ to 3
Streak: Light lead-grey to greyish blue
Colour: Light lead-gray to greyish
Environments:

Hydrothermal environments

Geocronite occurs in hydrothermal veins with sulphides and other sulphosalt minerals, (Webmin, HOM) associated with galena, pyrite, tetrahedrite, baryte, fluorite and quartz (HOM, Mindat).

At the Van Silver Property, Vancouver Mining District, British Columbia, Canada, geocronite often forms isolated crystal groups on ankerite and quartz, and rarely on baryte. It has been observed overgrown by miargyrite (MinRec 31.3.225).

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