Alarsite
A variety of Minerals
What is Alarsite?
Alarsite (AlAsO4) is an aluminium arsenate mineral with its name derived from its composition: aluminium and arsenate. It occurs as brittle subhedral grains which exhibit trigonal symmetry. It has a Mohs hardness of 5-5.5 and a specific gravity of 3.32. It is semitransparent, colorless with pale yellow tints and shows a vitreous luster. It is optically uniaxial (+) with refractive indices of nω = 1.596 and nε = 1.608. It was reported from fumaroles in the Tolbachik volcano, Kamchatka, Far Eastern Region, Russia. It occurs in association with fedotovite, klyuchevskite, lammerite, nabokoite, atlasovite, langbeinite, hematite and tenorite.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Alarsite 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.
Alarsite Localities Map
See where Alarsite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Colorless, with pale tints of yellow, green, blue due to inclusions
- Hardness (Mohs)
- 5 - 5.5
- Density
- 3.32 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- AlAsO4
- Elements
- Al, As, O
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Alarsite FAQs
How do I identify Alarsite?
Alarsite can be identified by its hardness of 5 - 5.5 on the Mohs scale, Colorless color. Look for these key characteristics when examining specimens.
What color is Alarsite?
Alarsite typically appears in Colorless, with pale tints of yellow, green, blue due to inclusions. Color can vary depending on impurities and formation conditions.
How hard is Alarsite?
Alarsite has a hardness of 5 - 5.5 on the Mohs scale. This gives it moderate hardness.
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