Vanadiocarpholite is an extremely rare member of the carpholite group, typically found as delicate, radiating fibrous bundles or acicular crystals. Collectors prize it for its unique yellow coloration and association with manganese-rich mineral assemblages. It is best identified through its distinct crystal habit and occurrence within low-grade metamorphic or hydrothermal environments.
Is this vanadiocarpholite?
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 vanadiocarpholite with a known reference. Vanadiocarpholite sits at Mohs 5-5.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Vanadiocarpholite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Vanadiocarpholite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: yellow, pale yellow.
- 5Look at form & habitCrystal system: orthorhombic. Typical habit: fibrous, acicular, radiating clusters.
Often confused with
Vanadiocarpholite vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside vanadiocarpholite
Minerals reported to co-occur with vanadiocarpholite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Mn²⁺Al₂Si₂O₆(OH)₄
- Mohs hardness
- 5-5.5
- Density
- 3.1-3.2 g/cm³
- Colors
- Streak
- White
- Luster
- Vitreous
- Transparency
- Translucent
- Crystal system
- Orthorhombic
- Crystal habit
- Fibrous, Acicular, Radiating Clusters
- Cleavage
- Good in One Direction
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Hydrothermal Quartz Veins in Manganese-rich Rocks
- Typical price
- $20-150 for small specimens
Where rockhounds find vanadiocarpholite
Classic worldwide localities
- Maderanilla, Spain
- Manganese mines of the Ardennes, Belgium
- Various Alpine-type fissures
Field-hunting tip
Look in hydrothermal quartz veins in manganese-rich rocks country — that is the host setting where vanadiocarpholite typically forms. If you start seeing quartz, rhodochrosite, pyrolusite in float, you are in the right ground. Field specimens usually show a fibrous, acicular, radiating clusters habit, so train your eye for that shape before scanning the outcrop.
Common questions
How do you identify vanadiocarpholite?+
Where is vanadiocarpholite found?+
How much is vanadiocarpholite worth?+
What rocks look like vanadiocarpholite?+
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Find vanadiocarpholite on the map
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