Nissonite

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Nissonite specimen - rock identification

What is Nissonite?

Nissonite is a very rare copper phosphate mineral with formula: Cu2Mg2(PO4)2(OH)2·5H2O. It crystallizes in the monoclinic crystal system typically as crusts, tabular crystals, and diamond-shaped crystals. The color is blue-green. It has a light green streak, a Mohs hardness of 2.5 and a specific gravity of 2.73. Cleavage is {100} distinct. Nissonite was discovered in 1966 and was named after William H. Nisson (1912–1965). It is from Llanada copper mine, near Llanada, San Benito Co., California.

Nissonite Market Value Calculator

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Nissonite Localities Map

See where Nissonite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

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North ZoneCentral RidgeSouth Basin

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Quick Facts

Physical Properties

Color
bluish green
Hardness (Mohs)
2.5
Density
2.74 g/cm³

Chemical Properties

Chemical Formula
Cu2Mg2(PO4)2(OH)2 · 5H2O
Elements
Cu, H, Mg, O, P
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