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.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Nissonite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
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
Identify Nissonite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
Nissonite FAQs
How do I identify Nissonite?
Nissonite can be identified by its hardness of 2.5 on the Mohs scale, bluish green color. Look for these key characteristics when examining specimens.
What color is Nissonite?
Nissonite typically appears in bluish green. Color can vary depending on impurities and formation conditions.
How hard is Nissonite?
Nissonite has a hardness of 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
%252FAbenakiite-(ce)-01.jpg&size=small)
