Utahite
A variety of Minerals
What is Utahite?
Utahite is an extremely rare secondary copper zinc tellurate mineral found as a product of oxidation. Its chemical formula is Cu5Zn3(TeO4)4(OH)8•7H2O. It was first described in 1997 for an occurrence in the Centennial Eureka mine, one mile southeast of Eureka, Tintic District, Juab County, Utah, US (type locality). The discovery site was a mine dump of a hydrothermal ore deposit where it occurs with cesbronite and quartz. It has also been reported from the Empire Mine in the Tombstone District of Cochise County, Arizona.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Utahite 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.
Utahite Localities Map
See where Utahite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Light blue, blue-green
- Hardness (Mohs)
- 4 - 5
- Density
- 5.33 g/cm³
- Streak
- Pale blue
Chemical Properties
- Chemical Formula
- Cu5Zn3(TeO4)4(OH)8 · 7H2O
- Elements
- Cu, H, O, Te, Zn
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Utahite FAQs
How do I identify Utahite?
Utahite can be identified by its hardness of 4 - 5 on the Mohs scale, Light blue color. Look for these key characteristics when examining specimens.
What color is Utahite?
Utahite typically appears in Light blue, blue-green. Color can vary depending on impurities and formation conditions.
How hard is Utahite?
Utahite has a hardness of 4 - 5 on the Mohs scale. This gives it moderate hardness.
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