Tetraferriannite
A variety of Minerals
What is Tetraferriannite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Tetraferriannite 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
- Brown to black
- Hardness (Mohs)
- 2.5 - 3
- Rock tumbling
- Not recommended
- Streak
- Light brown
Chemical Properties
- Chemical Formula
- KFe2+3(Si3Fe3+)O10(OH)2 Fe(III) may be replaced by minor Al.
- Elements
- Fe, H, K, O, Si
Also Known As
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Tetraferriannite FAQs
How do I identify Tetraferriannite?
Tetraferriannite can be identified by its hardness of 2.5 - 3 on the Mohs scale, Brown to black color. Look for these key characteristics when examining specimens.
What color is Tetraferriannite?
Tetraferriannite typically appears in Brown to black. Color can vary depending on impurities and formation conditions.
How hard is Tetraferriannite?
Tetraferriannite has a hardness of 2.5 - 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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