Tvrdýite
A variety of Minerals
What is Tvrdýite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Tvrdýite 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.
Tvrdýite Localities Map
See where Tvrdýite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Silvery to olive-greyish-green
- Hardness (Mohs)
- 3 - 4
- Density
- 2.834 g/cm³
- Streak
- Greyish-white
Chemical Properties
- Chemical Formula
- Fe2+Fe3+2 Al3(PO4)4(OH)5(H2O)4·2H2O
- Elements
- Al, Fe, H, O, P

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Tvrdýite FAQs
How do I identify Tvrdýite?
Tvrdýite can be identified by its hardness of 3 - 4 on the Mohs scale, Silvery to olive-greyish-green color. Look for these key characteristics when examining specimens.
What color is Tvrdýite?
Tvrdýite typically appears in Silvery to olive-greyish-green. Color can vary depending on impurities and formation conditions.
How hard is Tvrdýite?
Tvrdýite has a hardness of 3 - 4 on the Mohs scale. This makes it a soft mineral that can be scratched easily.


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