Pecoraite
A variety of Minerals

What is Pecoraite?
Pecoraite is a nickel silicate mineral and a member of the serpentine group. It was named after geologist William Thomas Pecora. It is monoclinic and has a chemical composition of Ni3(Si2O5)(OH)4. It is associated with the weathering-and-or oxidation of meteorites or nickel sulfide minerals such as millerite. It is also found in altered ultramafic rocks. Pecoriate is typically a green, lime green, or bluegreen mineral with a waxy, or earthy luster and a mohs hardness of 2.5. Common textural habits associated with Pecoraite are curved plates, spirals and tubes. It can also be granular and massive.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Pecoraite 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.
Pecoraite Localities Map
See where Pecoraite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Green, blue-green yellow-green
- Density
- 3.47 g/cm³
Chemical Properties
- Chemical Formula
- Ni3(Si2O5)(OH)4
- Elements
- H, Ni, O, Si

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Pecoraite FAQs
How do I identify Pecoraite?
Pecoraite can be identified by its Green color. Look for these key characteristics when examining specimens.
What color is Pecoraite?
Pecoraite typically appears in Green, blue-green yellow-green. Color can vary depending on impurities and formation conditions.


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