$450Median
238Sold (12 mo)
$30Last sale
Updated 2d ago
Heulandite from Skookumchuck Dam, Washington, USA
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Light pink sparkling pearly crystals of heulandite to 0.3 cm in size across the top of matrix. This is in very good condition. Collected by Chuck Trantham.Located in Thurston County, Washington, the area near the Skookumchuck Dam is renowned among rockhounds for its volcanic geology, which features Tertiary basalt flows, tuffs, and sedimentary beds ideal for mineral deposition. During construction of the dam and reservoir in the late 1960s, extensive excavation exposed rich hydrothermal deposits, making the site famous for producing high-quality petrified wood, colorful agates, jaspers, and zeolite minerals. Although access is now heavily restricted due to private land ownership and dam operations, collecting history in the region remains legendary among local collectors who historically gathered prized specimens of carnelian agate and fossilized wood from the river drainage and exposed road cuts.
Product details
SpeciesHeulandite
SizeMiniature
Dimensions3.7 x 2.5 x 2.0 cm
Added on10/16/2026
LocalityUSA, Washington, Skookumchuck Dam
Current owner
Unknown Owner
- Acquired
- Oct 2026
- Price paid
- $30.00
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | Weinrich Minerals | Not disclosed |
Learn more
Mineral guide
Learn about Heulandite
wedge-shaped, pastel crystals formed in basalt vesicles; prized for aesthetics, variety, and accessible price, with Indian and Icelandic material.Regional guide
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