Ramsdellite
A variety of Minerals
What is Ramsdellite?
Ramsdellite (MnO2) is an orthorhombic manganese dioxide mineral. It is relatively uncommon, and is usually found in deposits containing other manganese oxide crystals.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ramsdellite 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.
Ramsdellite Localities Map
See where Ramsdellite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- black, steel-grey
- Hardness (Mohs)
- 3
- Density
- 4.79 g/cm³
- Streak
- brownish black, black
Chemical Properties
- Chemical Formula
- Mn4+O2
- Elements
- Mn, O
Also Known As
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Ramsdellite FAQs
How do I identify Ramsdellite?
Ramsdellite can be identified by its hardness of 3 on the Mohs scale, black color. Look for these key characteristics when examining specimens.
What color is Ramsdellite?
Ramsdellite typically appears in black, steel-grey. Color can vary depending on impurities and formation conditions.
How hard is Ramsdellite?
Ramsdellite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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