Arseniosiderite
A variety of Minerals
What is Arseniosiderite?
Arseniosiderite is a rare arsenate mineral formed by the oxidation of other arsenic-containing minerals, such as scorodite or arsenopyrite. It occurs in association with beudantite, carminite, dussertite, pharmacolite, pitticite, adamite and erythrite. The name arseniosiderite reflects two major elements of the mineral, arsenic and iron (Greek sideros means iron).
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Arseniosiderite 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
- Golden-yellow to yellow-brown, reddish-brown, brown, black; reddish brown to brownish yellow in transmitted light..
- Hardness (Mohs)
- 4.5
- Rock tumbling
- Not recommended
- Density
- 3.78 g/cm³
- Streak
- Ocher-yellow.
Chemical Properties
- Chemical Formula
- Ca2Fe3+3(AsO4)3O2 · 3H2O
- Elements
- As, Ca, Fe, H, O
Also Known As
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Arseniosiderite FAQs
How do I identify Arseniosiderite?
Arseniosiderite can be identified by its hardness of 4.5 on the Mohs scale, Golden-yellow to yellow-brown color. Look for these key characteristics when examining specimens.
What color is Arseniosiderite?
Arseniosiderite typically appears in Golden-yellow to yellow-brown, reddish-brown, brown, black; reddish brown to brownish yellow in transmitted light... Color can vary depending on impurities and formation conditions.
How hard is Arseniosiderite?
Arseniosiderite has a hardness of 4.5 on the Mohs scale. This gives it moderate hardness.
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