Goosecreekite is a relatively rare member of the zeolite group often forming small, clear, tabular crystals in volcanic cavities. It is best identified by its association with other zeolites and its distinctive monoclinic crystal habit in basaltic environments.
Is this goosecreekite?
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 goosecreekite with a known reference. Goosecreekite sits at Mohs 4 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Goosecreekite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Goosecreekite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: colorless, white.
- 5Look at form & habitCrystal system: monoclinic. Typical habit: tabular crystals, radiating sprays.
Often confused with
Goosecreekite vs. its common look-alikes — and how to tell them apart in the field.
Often found alongside goosecreekite
Minerals reported to co-occur with goosecreekite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- CaAl₂Si₆O₁₆·5H₂O
- Mohs hardness
- 4
- Density
- 2.19 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Monoclinic
- Crystal habit
- Tabular Crystals, Radiating Sprays
- Cleavage
- Perfect On {010}
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Basalt Cavities, Trap Rock Quarries
- Typical price
- $20-200 depending on specimen size and clarity
Where rockhounds find goosecreekite
Classic worldwide localities
- Goose Creek Quarry, Virginia, USA
- Iceland
- India
- Faeroe Islands
Field-hunting tip
Look in basalt cavities, trap rock quarries country — that is the host setting where goosecreekite typically forms. If you start seeing laumontite, quartz, apophyllite in float, you are in the right ground. Field specimens usually show a tabular crystals, radiating sprays habit, so train your eye for that shape before scanning the outcrop.
Common questions
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Find goosecreekite on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
