Igneous/Sedimentary/Metamorphic with Mineral Vein
Wishing Rock (Quartz Vein in Host Rock)
Silicon dioxide (SiO2) vein in various host rocks
AI-generated identification · may be incorrectHost 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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Other igneous/sedimentary/metamorphic with mineral vein specimens
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Lead Sulfide (PbS)
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Quartz
Silicon Dioxide (SiO2)
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Quartz vein fragment
Quartz, silicon dioxide (SiO₂), likely milky to translucent quartz with iron-oxide or clay inclusions
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Rough amber-colored quartz or calcite fragment
Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing
mineral
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
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Pyrite
Iron Sulfide (FeS2)
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