Ahlfeldite
A variety of Minerals
What is Ahlfeldite?
Ahlfeldite ((Ni,Co)[SeO3]·2H2O) is a mineral of secondary origin. It is named after Friedrich Ahlfeld (1892–1982), a German-Bolivian mining engineer and geologist. Its type locality is Virgen de Surumi mine, Pakajake Canyon, Chayanta Province, Potosí Department, Bolivia.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ahlfeldite 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
- apple-green, brown, pink, yellowish
- Hardness (Mohs)
- 2 - 2.5
- Rock tumbling
- Not recommended
- Density
- 3.51 g/cm³
- Streak
- pale green, white
Chemical Properties
- Chemical Formula
- Ni(SeO3) · 2H2O May contain minor Co.
- Elements
- H, Ni, O, Se
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Ahlfeldite FAQs
How do I identify Ahlfeldite?
Ahlfeldite can be identified by its hardness of 2 - 2.5 on the Mohs scale, apple-green color. Look for these key characteristics when examining specimens.
What color is Ahlfeldite?
Ahlfeldite typically appears in apple-green, brown, pink, yellowish. Color can vary depending on impurities and formation conditions.
How hard is Ahlfeldite?
Ahlfeldite has a hardness of 2 - 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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