Igneous/Sedimentary/Metamorphic with Mineral Vein
Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
Host rock varies in hardness and color. The white vein is typically quartz, which has a Mohs hardness of 7, vitreous luster, and is usually white or colorless in this context.
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Physical properties
Host rock varies in hardness and color. The white vein is typically quartz, which has a Mohs hardness of 7, vitreous luster, and is usually white or colorless in this context.
Formation & geological history
Formed when mineral-rich fluids (often silica) flow through cracks in existing rock and crystallize, forming a vein. Over time, the rock is weathered and tumbled by water into a smooth pebble.
Uses & applications
Primarily collected as a novelty or talisman (a 'wishing stone'). Smooth river rocks are also used in landscaping or decorative displays.
Geological facts
Folklore dictates that a rock with a continuous white line wrapping all the way around is a 'wishing stone' and can grant a wish.
Field identification & locations
Identify by a solid white stripe (usually quartz) running continuously around a polished or water-tumbled stone. Commonly found on beaches or in riverbeds where rocks are naturally tumbled.
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Quartz Vein in Host Rock
Quartz (SiO2) in Mafic or Sedimentary Matrix
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White Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
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Quartz (Small Fragment)
Silicon Dioxide (SiO2)
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Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
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