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Formula: CaCu(SiO4).H2O
Unclassified silicate
Crystal System: Monoclinic
Specific gravity: 3.16 to 3.18 measured, 3.67 calculated
Hardness: not determined
Streak: Light blue
Colour: Deep azure blue
Common impurities: Al,Fe,Mg
Environments:
Localities
At the type locality, Bawana Mine, Beaver county, Utah, USA, stringhamite occurs in fractures in
diopside-magnetite
skarn near a contact
between quartz monzonite and
limestone,
(Mindat, Dana) together with secondary and
primary
copper minerals (Webmin), associated with
thaumasite, tenorite,
kinoite and calcite
(AM61.189, HOM).
At Christmas, Arizona, USA, stringhamite is associated with kinoite and
apophyllite
(HOM).
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