Weeksite
A variety of Minerals
What is Weeksite?
Weeksite is a naturally occurring uranium silicate mineral with the chemical formula: K2(UO2)2Si6O15•4(H2O), potassium uranyl silicate. Weeksite has a Mohs hardness of 1-2. It was named for USGS mineralogist Alice Mary Dowse Weeks (1909–1988).
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Weeksite 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.
Weeksite Localities Map
See where Weeksite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Appearance of Weeksite
Weeksite is visually similar to other uranium minerals such as carnotite and zippeite, both being encrustations that form on other rocks (usually sandstones or limestones).
Quick Facts
Physical Properties
- Color
- Yellow
- Hardness (Mohs)
- 1 - 2
Chemical Properties
- Chemical Formula
- K2(UO2)2(Si5O13) · 4H2O
- Elements
- H, K, O, Si, U
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Weeksite FAQs
How do I identify Weeksite?
Weeksite can be identified by its hardness of 1 - 2 on the Mohs scale, Yellow color. Look for these key characteristics when examining specimens.
What color is Weeksite?
Weeksite typically appears in Yellow. Color can vary depending on impurities and formation conditions.
How hard is Weeksite?
Weeksite has a hardness of 1 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
What is the appearance of weeksite of Weeksite?
Weeksite is visually similar to other uranium minerals such as carnotite and zippeite, both being encrustations that form on other rocks (usually sandstones or limestones).
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