Balliranoite is a rare mineral belonging to the cancrinite group, typically found within volcanic ejecta associated with the Somma-Vesuvius complex. It forms small, prismatic crystals that require microscopic examination or expert identification due to their visual similarity to other framework silicates.
Is this balliranoite?
4-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 balliranoite with a known reference. Balliranoite sits at Mohs 5, softer than the next harder reference, harder than the previous one.
- 2Read the lusterHold the specimen under a strong light. Luster: vitreous.
- 3Match the color rangeCompare against the expected color range: colorless.
- 4Look at form & habitCrystal system: hexagonal. Typical habit: prismatic crystals.
Often confused with
Balliranoite vs. its common look-alikes, and how to tell them apart in the field.
Often found alongside balliranoite
Minerals reported to co-occur with balliranoite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- (Na,K)₆Ca₂(Si₆Al₆O₂₄)Cl₂(CO₃)
- Mohs hardness
- 5
- Density
- 2.48 g/cm³
- Colors
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Hexagonal
- Crystal habit
- Prismatic crystals
- Cleavage
- Perfect on {101̄0}
- Rarity
- Rare
- Uses
- Collector
- Host rock
- A product of metasomatic reaction between alkaline magma and limestone
Where rockhounds find balliranoite
Classic worldwide localities
- Monte Somma–Vesuvio volcanic complex, Campania, Italy
Field-hunting tip
Where it forms: A product of metasomatic reaction between alkaline magma and limestone. If you start seeing orthoclase, phlogopite, clinohumite in float, you are in the right ground. Typical habit: prismatic crystals. Train your eye for that shape before scanning the outcrop.
Common questions
How do you identify balliranoite?+
Where is balliranoite found?+
What rocks look like balliranoite?+
What minerals are found with balliranoite?+
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Find balliranoite on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
