Folvikite
A variety of Pinakiolite Group
What is Folvikite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Folvikite 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.
Folvikite Localities Map
See where Folvikite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Black to dark reddish-brown
- Hardness (Mohs)
- 6
- Density
- 4.14 g/cm³
- Streak
- Reddish-brown
Chemical Properties
- Chemical Formula
- Sb5+Mn3+(Mg,Mn2+)10O8(BO3)4
- Elements
- B, Mg, Mn, O, Sb
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Folvikite FAQs
How do I identify Folvikite?
Folvikite can be identified by its hardness of 6 on the Mohs scale, Black to dark reddish-brown color. Look for these key characteristics when examining specimens.
What color is Folvikite?
Folvikite typically appears in Black to dark reddish-brown. Color can vary depending on impurities and formation conditions.
How hard is Folvikite?
Folvikite has a hardness of 6 on the Mohs scale. This gives it moderate hardness.