sedimentary
Wishing Stone with Quartz Vein
Quartz-veined sedimentary pebble
Hardness varies (quartz is 7 on Mohs scale, surrounding matrix may be 6 or lower); brownish-gray exterior with a distinct reddish-orange cross-cutting mineral vein; dull to vitreous luster; microcrystalline to massive crystal structure; smooth, water-worn rounded pebble shape.
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Physical properties
Hardness varies (quartz is 7 on Mohs scale, surrounding matrix may be 6 or lower); brownish-gray exterior with a distinct reddish-orange cross-cutting mineral vein; dull to vitreous luster; microcrystalline to massive crystal structure; smooth, water-worn rounded pebble shape.
Formation & geological history
Formed through the deposition and lithification of sediments (sedimentary rock), later fractured by tectonic forces where hydrothermal fluids deposited silica minerals (quartz) into the cracks, followed by weathering and water transport (rounding) in a river or stream environment.
Uses & applications
Commonly collected as a curiosity or 'wishing stone' (traditionally believed to bring good luck if a continuous stripe encircles the stone), used in decorative landscaping, or kept as a natural specimen.
Geological facts
Stones featuring a single contrasting mineral band running around them are often called 'wishing stones' or 'banded rocks' in folklore, and finding one with an unbroken band is considered lucky by beachcombers and rockhounds.
Field identification & locations
Easily identified in the field by smooth, rounded water-worn shapes crossed by contrasting mineral veins (often quartz or calcite). Commonly found along riverbeds, lakeshores, and beaches worldwide.
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