Ranciéite
A variety of Minerals
What is Ranciéite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ranciéite 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
- Black, brownish, violet.
- Hardness (Mohs)
- 2.5 - 3
- Rock tumbling
- Not recommended
- Density
- 3.2 g/cm³
- Streak
- Dark brown
Chemical Properties
- Chemical Formula
- (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O
- Elements
- Ca, H, Mn, O
Also Known As
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Ranciéite FAQs
How do I identify Ranciéite?
Ranciéite can be identified by its hardness of 2.5 - 3 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.
What color is Ranciéite?
Ranciéite typically appears in Black, brownish, violet.. Color can vary depending on impurities and formation conditions.
How hard is Ranciéite?
Ranciéite has a hardness of 2.5 - 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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