Nissonite
A variety of Minerals

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.
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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