Armbrusterite
A variety of Minerals
What is Armbrusterite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Armbrusterite 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
- Hardness (Mohs)
- 3.5
- Rock tumbling
- Not recommended
- Streak
- light-brown
Chemical Properties
- Chemical Formula
- K5Na7Mn15(Si9O22)410 · 4H2O
- Elements
- H, K, Mn, Na, O, Si
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Armbrusterite FAQs
How do I identify Armbrusterite?
Armbrusterite can be identified by its hardness of 3.5 on the Mohs scale, dark reddish-brown color. Look for these key characteristics when examining specimens.
What color is Armbrusterite?
Armbrusterite typically appears in dark reddish-brown. Color can vary depending on impurities and formation conditions.
How hard is Armbrusterite?
Armbrusterite has a hardness of 3.5 on the Mohs scale. This gives it moderate hardness.
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