Umohoite
A variety of Minerals
What is Umohoite?
Umohoite is a rare oxide and hydroxide mineral. The name of this mineral reflects its composition: uranyl (U), molybdate (Mo) and water (H2O). Its chemical formula is (UO2)MoO4·2H2O. Umohoide's type location is in Marysvale, the mineral was first described by Paul F. Kerr and G. P. Brophy in 1953.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Umohoite 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
- Black, blue-black, dark green
- Hardness (Mohs)
- 2
- Rock tumbling
- Not recommended
- Density
- 4.49 g/cm³
Chemical Properties
- Chemical Formula
- (UO2)MoO4 · 2H2O
- Elements
- H, Mo, O, U
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Umohoite FAQs
How do I identify Umohoite?
Umohoite can be identified by its hardness of 2 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.
What color is Umohoite?
Umohoite typically appears in Black, blue-black, dark green. Color can vary depending on impurities and formation conditions.
How hard is Umohoite?
Umohoite has a hardness of 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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