Coyoteite
A variety of Minerals
What is Coyoteite?
Coyoteite is a hydrated sodium iron sulfide mineral. The mineral was named coyoteite after Coyote Peak near Orick, California where it was discovered (along with another rare mineral, orickite). This mineral is unstable under normal atmospheric conditions, making it rare at the surface. The mineral was first described in a petrographic study of a sample of a mafic diatreme at Coyote Peak. The largest piece of coyoteite found on that specimen has the dimensions of 0.2 × 0.4 mm.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Coyoteite 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.
Coyoteite Localities Map
See where Coyoteite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Black to pale brownish grey
- Hardness (Mohs)
- 1.5
- Density
- 2.879 g/cm³
- Streak
- Black
Chemical Properties
- Chemical Formula
- NaFe3S5 · 2H2O
- Elements
- Fe, H, Na, O, S
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Coyoteite FAQs
How do I identify Coyoteite?
Coyoteite can be identified by its hardness of 1.5 on the Mohs scale, Black to pale brownish grey color. Look for these key characteristics when examining specimens.
What color is Coyoteite?
Coyoteite typically appears in Black to pale brownish grey. Color can vary depending on impurities and formation conditions.
How hard is Coyoteite?
Coyoteite has a hardness of 1.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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