metamorphic
Wishing Stone with Quartz Vein
Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)
Hardness: 7 (vein), 5-6 (matrix); Color: Grey/blue-grey matrix with a distinct white or milky horizontal band; Luster: Dull to waxy; Structure: Crystalline quartz vein; Cleavage: None (conchoidal fracture).
- Hardness
- 7 (vein), 5-6 (matrix)
- Luster
- Dull to waxy
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Physical properties
Hardness: 7 (vein), 5-6 (matrix); Color: Grey/blue-grey matrix with a distinct white or milky horizontal band; Luster: Dull to waxy; Structure: Crystalline quartz vein; Cleavage: None (conchoidal fracture).
Formation & geological history
Formed through hydrothermal processes where mineral-rich hot water flows through a crack in a pre-existing stone (often shale or slate) and cools to crystallize quartz. The stone is then naturally weathered and rounded by water action in rivers or on beaches.
Uses & applications
Primarily used as pocket stones, decorative beach decor, or keep-sakes. Metaphysical collectors use them as 'wishing stones'. No significant industrial use due to small size.
Geological facts
In folklore, a 'wishing stone' is a pebble with a single continuous white line encircling it. It is said that if you trace your finger around the line while making a wish, it will come true. These are iconic examples of geological 'veining'.
Field identification & locations
Identify in the field by looking for a pebble where a single white band wraps entirely around the rock without breaking. They are extremely common on glaciated beaches in the Northeast US, UK, and Scandinavia.
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