Franconite
A variety of Franconite Group
What is Franconite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Franconite 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.
Franconite Localities Map
See where Franconite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- White
- Hardness (Mohs)
- 4
- Density
- 2.71 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Na(Nb2O5)(OH) · 3H2O
- Elements
- H, Na, Nb, O
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Franconite FAQs
How do I identify Franconite?
Franconite can be identified by its hardness of 4 on the Mohs scale, White color. Look for these key characteristics when examining specimens.
What color is Franconite?
Franconite typically appears in White. Color can vary depending on impurities and formation conditions.
How hard is Franconite?
Franconite has a hardness of 4 on the Mohs scale. This gives it moderate hardness.