Markeyite
A variety of Minerals
What is Markeyite?
Markeyite, a uranyl carbonate mineral discovered in the Markey Mine in Utah, USA. A group led by Anthony R. Kampf, a mineralogist at the Natural History Museum of Los Angeles County, USA discovered its structure. Cotype material for this mineral resides in the collections of the Natural History Museum, Los Angeles County, USA, and the Fersman Mineralogical Museum, Russian Academy of Sciences, Russia.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Markeyite 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.
Markeyite Localities Map
See where Markeyite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Pale yellowish-green
- Hardness (Mohs)
- 1.5 - 2
- Density
- 2.699 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Ca9(UO2)4(CO3)13·28H2O
- Elements
- C, Ca, H, O, U

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Markeyite FAQs
How do I identify Markeyite?
Markeyite can be identified by its hardness of 1.5 - 2 on the Mohs scale, Pale yellowish-green color. Look for these key characteristics when examining specimens.
What color is Markeyite?
Markeyite typically appears in Pale yellowish-green. Color can vary depending on impurities and formation conditions.
How hard is Markeyite?
Markeyite has a hardness of 1.5 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.


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