Andyrobertsite
A variety of Minerals
What is Andyrobertsite?
Andyrobertsite is a rare, complex arsenate mineral with a blue color. It is found in the Tsumeb mine in Namibia and named after Andrew C. Roberts (b. 1950), mineralogist with the Geological Survey of Canada. A Ca-rich analogue (with Ca instead of Cd) is called calcioandyrobertsite and has a more greenish tint.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Andyrobertsite 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.
Andyrobertsite Localities Map
See where Andyrobertsite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Hardness (Mohs)
- 3
Chemical Properties
- Chemical Formula
- KCdCu5(AsO4)4(H2AsO4) · 2H2O
- Elements
- As, Cd, Cu, H, K, O
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Andyrobertsite FAQs
How do I identify Andyrobertsite?
Andyrobertsite can be identified by its hardness of 3 on the Mohs scale. Look for these key characteristics when examining specimens.
How hard is Andyrobertsite?
Andyrobertsite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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