igneous or sedimentary
Wishing Stone (Basalt or Siltstone with Quartz/Calcite Vein)
Basalt (SiO2+MgO+FeO) or Siltstone with a Quartz (SiO2) or Calcite (CaCO3) vein
Hardness: 6-7 (if quartz vein) or 3 (if calcite). Color: Dark grey to charcoal matrix with a continuous white or tan circular vein. Luster: Dull/earthy for the rock, vitreous for the vein. Texture: Smooth, water-worn cobble.
- Hardness
- 6-7 (if quartz vein) or 3 (if calcite)
- Luster
- Dull/earthy for the rock, vitreous for the vein
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Physical properties
Hardness: 6-7 (if quartz vein) or 3 (if calcite). Color: Dark grey to charcoal matrix with a continuous white or tan circular vein. Luster: Dull/earthy for the rock, vitreous for the vein. Texture: Smooth, water-worn cobble.
Formation & geological history
Formed from volcanic activity (basalt) or sediment accumulation, followed by tectonic stress creating fractures. Fluids rich in silica or carbonate then precipitated minerals into the crack, forming the distinct line. Usually found as river or beach pebbles smoothed by erosion.
Uses & applications
Primarily aesthetic, used in landscaping, as wishing charms in folklore, and as educational specimens for showing geological intrusion.
Geological facts
Folklore dictates that a 'wishing stone' must have a single, continuous white band that circles the entire rock for a wish to come true. They are favorite finds for beachcombers and rockhounds worldwide.
Field identification & locations
Identify by looking for a dark, fine-grained rock with a prominent, single encircling stripe of a different mineral. Common in glacial till, rocky beaches, and riverbeds.
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