Bieberite
A variety of Minerals
What is Bieberite?
Bieberite (CoSO4 · 7H2O) is a pinkish red colored sulfate mineral high in cobalt content. The name is derived from the type locality at the copper deposit in Bieber, Hesse, Germany. It has been described and reported as far back as the 1700s. Bieberite primarily occurs as a secondary mineral, forming in cobalt-bearing arsenide and sulfide deposits through oxidation. Natural bieberite crystals may have a small amount of cobalt lattice sites instead occupied by magnesium and copper (Palache et al., 1960).
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Bieberite 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
- Red-pink, flesh-red; colourless to pale rose in transmitted light.
- Hardness (Mohs)
- 2
- Rock tumbling
- Not recommended
- Density
- 1.83 g/cm³
Chemical Properties
- Chemical Formula
- CoSO4 · 7H2O
- Elements
- Co, H, O, S
Also Known As
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Bieberite FAQs
How do I identify Bieberite?
Bieberite can be identified by its hardness of 2 on the Mohs scale, Red-pink color. Look for these key characteristics when examining specimens.
What color is Bieberite?
Bieberite typically appears in Red-pink, flesh-red; colourless to pale rose in transmitted light.. Color can vary depending on impurities and formation conditions.
How hard is Bieberite?
Bieberite has a hardness of 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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