Stibioclaudetite is a very rare arsenic oxide mineral that typically forms as an alteration product of arsenic-bearing minerals in hydrothermal environments. Collectors usually find it as delicate platy crystals or thin crusts associated with other arsenic minerals in old mine dumps. Due to its toxic arsenic content and extreme rarity, it is generally kept in secure, enclosed display cases by advanced mineral collectors.
Is this stibioclaudetite?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch stibioclaudetite with a known reference. Stibioclaudetite sits at Mohs 2.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Stibioclaudetite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Stibioclaudetite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: white, colorless, yellowish.
- 5Look at form & habitCrystal system: monoclinic. Typical habit: platy crystals, crusts, tabular.
Often confused with
Stibioclaudetite vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside stibioclaudetite
Minerals reported to co-occur with stibioclaudetite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- As₂O₃
- Mohs hardness
- 2.5
- Density
- 4.45 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Monoclinic
- Crystal habit
- Platy Crystals, Crusts, Tabular
- Cleavage
- Perfect On {010}
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Hydrothermal Veins
- Typical price
- $50-300 per specimen
Where rockhounds find stibioclaudetite
Classic worldwide localities
- Jáchymov, Czech Republic
- Western Australia
Field-hunting tip
Look in hydrothermal veins country — that is the host setting where stibioclaudetite typically forms. If you start seeing arsenopyrite, realgar, orpiment in float, you are in the right ground. Field specimens usually show a platy crystals, crusts, tabular habit, so train your eye for that shape before scanning the outcrop.
Common questions
How do you identify stibioclaudetite?+
Where is stibioclaudetite found?+
How much is stibioclaudetite worth?+
Is stibioclaudetite safe to handle?+
What rocks look like stibioclaudetite?+
What minerals are found with stibioclaudetite?+
What kind of rock does stibioclaudetite form in?+
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Find stibioclaudetite on the map
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