Dachiardite-Na is a member of the zeolite group often found as delicate, prismatic to lath-like crystals forming radial sheaves. It is highly valued by zeolite collectors for its aesthetic crystal arrangements in vugs and vesicles of basaltic rocks.
Is this dachiardite-na?
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 dachiardite-na with a known reference. Dachiardite-Na sits at Mohs 4-4.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Dachiardite-Na leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Dachiardite-Na typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: white, colorless, pink, yellowish.
- 5Look at form & habitCrystal system: monoclinic. Typical habit: prismatic crystals, sheaf-like aggregates, radial clusters.
Often confused with
Dachiardite-Na vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside dachiardite-na
Minerals reported to co-occur with dachiardite-na. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- (Na₂,K₂,Ca)₄(Si₂₀Al₄)O₄₈·18H₂O
- Mohs hardness
- 4-4.5
- Density
- 2.1-2.2 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Translucent
- Crystal system
- Monoclinic
- Crystal habit
- Prismatic Crystals, Sheaf-like Aggregates, Radial Clusters
- Cleavage
- Perfect On {100}
- Rarity
- Rare
- Uses
- Collector, Scientific Research
- Host rock
- Hydrothermal Cavities in Volcanic Rocks
- Typical price
- $20-150 thumbnail specimens
Where rockhounds find dachiardite-na
Classic worldwide localities
- Elba, Italy
- Kurnell, Australia
- Teigarhorn, Iceland
- Near Kaman, Turkey
Field-hunting tip
Look in hydrothermal cavities in volcanic rocks country — that is the host setting where dachiardite-na typically forms. If you start seeing mordenite, heulandite, stilbite in float, you are in the right ground. Field specimens usually show a prismatic crystals, sheaf-like aggregates, radial clusters habit, so train your eye for that shape before scanning the outcrop.
Common questions
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Find dachiardite-na on the map
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