Aerugite
A variety of Minerals
What is Aerugite?
Aerugite is a rare complex nickel arsenate mineral with a variably reported formula: Ni9(AsO4)2AsO6. It forms green to deep blue-green trigonal crystals. It has a Mohs hardness of 4 and a specific gravity of 5.85 to 5.95. It was first described in 1858 in either the South Terres mine of Cornwall, England or in Erzgebirge, Saxony, Germany. The origin is disputed. The most common occurrence is as an incrustation on furnace walls in which ores are roasted. Its name comes from the Latin word aerugo for copper rust.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Aerugite 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.
Quick Facts
Physical Properties
- Color
- Dark grass-green, blue-green, pale brown.
- Hardness (Mohs)
- 4
- Rock tumbling
- Not recommended
- Density
- 5.772 g/cm³
- Streak
- Pale green, pale blue-green.
Chemical Properties
- Chemical Formula
- Ni8.5(AsO4)2As5+O8
- Elements
- As, Ni, O
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Aerugite FAQs
How do I identify Aerugite?
Aerugite can be identified by its hardness of 4 on the Mohs scale, Dark grass-green color. Look for these key characteristics when examining specimens.
What color is Aerugite?
Aerugite typically appears in Dark grass-green, blue-green, pale brown.. Color can vary depending on impurities and formation conditions.
How hard is Aerugite?
Aerugite has a hardness of 4 on the Mohs scale. This gives it moderate hardness.
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