Panunzite is a rare potassium-sodium aluminosilicate mineral that forms a series with kalsilite and nepheline. It is typically found as microscopic grains in alkaline volcanic rocks and requires precise analytical methods for field identification.
Is this panunzite?
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 panunzite with a known reference. Panunzite sits at Mohs 5.5, softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Streak: white.
- 3Read the lusterHold the specimen under a strong light. Luster: vitreous.
- 4Match the color rangeCompare against the expected color range: colorless, white.
- 5Look at form & habitCrystal system: hexagonal. Typical habit: massive, anhedral grains.
Often confused with
Panunzite vs. its common look-alikes, and how to tell them apart in the field.
Often found alongside panunzite
Minerals reported to co-occur with panunzite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- (K,Na)AlSiO₄
- Mohs hardness
- 5.5
- Density
- 2.59 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Hexagonal
- Crystal habit
- Massive, anhedral grains
- Cleavage
- {1010} and {0001}, poor
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Within cavities of pyroxene-rich ejecta blocks that are part of a recent volcanoclastic deposit
Where rockhounds find panunzite
Classic worldwide localities
- Monte Somma and Vesuvius, Campania, Italy
Field-hunting tip
Where it forms: Within cavities of pyroxene-rich ejecta blocks that are part of a recent volcanoclastic deposit. If you start seeing nepheline, augite, biotite in float, you are in the right ground. Typical habit: massive, anhedral grains. Train your eye for that shape before scanning the outcrop.
Common questions
How do you identify panunzite?+
Where is panunzite found?+
What rocks look like panunzite?+
What minerals are found with panunzite?+
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What is panunzite used for?+
Find panunzite on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
