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Eckel reported the presence of acicular pyrite crystals.
The largest amphibole crystals are embedded in the rock matrix, whereas the smaller acicular crystals line the hollows.
It occurs as sky-blue acicular crystals associated with hydrozincite and hemimorphite at the Billy Springs mine near Mount Fitton, and at the Mount Malvern mine, Clarendon, South Australia.
Some wire silver from the White Raven and Black Jack mines of the Ward district, Boulder County, were coated with acicular crystals of primary acanthite.
Sukow suggested that the coloration may be due to aggregates of acicular crystals of copper minerals scattered or concentrated throughout the datolite nodule.
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