Jurbanite
A variety of Minerals
What is Jurbanite?
Jurbanite is a sulfate mineral with the chemical formula AlSO4(OH)·5H2O. Its molecular weight is 230.13 g/mol. It crystallizes in the monoclinic system and is dimorphous with the orthorhombic mineral rostite. Jurbanite occurs as a secondary (post-mine) mineral in mines containing sulfide minerals. Jurbanite was first described for an occurrence in the San Manuel mine of Pinal County, Arizona and first described in 1976s. It was named for Joseph John Urban, the mineral collector who discovered it.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Jurbanite 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
- colourless
- Hardness (Mohs)
- 2.5
- Rock tumbling
- Not recommended
- Density
- 1.786 g/cm³
Chemical Properties
- Chemical Formula
- Al(SO4)(OH) · 5H2O
- Elements
- Al, H, O, S
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Jurbanite FAQs
How do I identify Jurbanite?
Jurbanite can be identified by its hardness of 2.5 on the Mohs scale, colourless color. Look for these key characteristics when examining specimens.
What color is Jurbanite?
Jurbanite typically appears in colourless. Color can vary depending on impurities and formation conditions.
How hard is Jurbanite?
Jurbanite has a hardness of 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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