Claudetite
A variety of Minerals
What is Claudetite?
Claudetite is an arsenic oxide mineral with chemical formula As2O3. Claudetite is formed as an oxidation product of arsenic sulfides and is colorless or white. It can be associated with arsenolite (the cubic form of As2O3) as well as realgar (As4S4), orpiment (As2S3) and native sulfur. It was first described in 1868 for an occurrence in the San Domingo mines, Algarve, Portugal. It was first described by and named for the French chemist Frederick Claudet.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Claudetite 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, white
- Hardness (Mohs)
- 2.5
- Rock tumbling
- Not recommended
Chemical Properties
- Chemical Formula
- As2O3
- Elements
- As, O
Also Known As
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Claudetite FAQs
How do I identify Claudetite?
Claudetite 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 Claudetite?
Claudetite typically appears in Colourless, white. Color can vary depending on impurities and formation conditions.
How hard is Claudetite?
Claudetite 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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