Franklinfurnaceite
A variety of Chlorite Group
What is Franklinfurnaceite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Franklinfurnaceite 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
- Dark reddish brown to brownish black
- Hardness (Mohs)
- 3
- Rock tumbling
- Not recommended
- Density
- 3.74 g/cm³
- Streak
- Dark brown
Chemical Properties
- Chemical Formula
- Ca2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8 Zn is tetrahedrally coordinated.
- Elements
- Ca, Fe, H, Mn, O, Si, Zn
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Franklinfurnaceite FAQs
How do I identify Franklinfurnaceite?
Franklinfurnaceite can be identified by its hardness of 3 on the Mohs scale, Dark reddish brown to brownish black color. Look for these key characteristics when examining specimens.
What color is Franklinfurnaceite?
Franklinfurnaceite typically appears in Dark reddish brown to brownish black. Color can vary depending on impurities and formation conditions.
How hard is Franklinfurnaceite?
Franklinfurnaceite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.