Johnsomervilleite
A variety of Minerals
What is Johnsomervilleite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Johnsomervilleite 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.
Johnsomervilleite Localities Map
See where Johnsomervilleite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Dark brown
- Hardness (Mohs)
- 4.5
- Density
- 3.41 g/cm³
- Streak
- Light brown
Chemical Properties
- Chemical Formula
- Na3CaFe11(PO4)9 Originally given, i.a., as {Ca}{Na6◻2}{Ca6Na2}{(Fe2+,Mg,Mn2+)43}(PO4)36; the above IMA formula is wrong
- Elements
- Ca, Fe, Na, O, P
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Johnsomervilleite FAQs
How do I identify Johnsomervilleite?
Johnsomervilleite can be identified by its hardness of 4.5 on the Mohs scale, Dark brown color. Look for these key characteristics when examining specimens.
What color is Johnsomervilleite?
Johnsomervilleite typically appears in Dark brown. Color can vary depending on impurities and formation conditions.
How hard is Johnsomervilleite?
Johnsomervilleite has a hardness of 4.5 on the Mohs scale. This gives it moderate hardness.
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