igneous or sedimentary

Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins)

Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)

AI-generated identification · may be incorrect

Hardness: 5-7 (Mohs scale), Color: Dark grey to black matrix with white or cream streaks, Luster: Dull/Earthy matrix with Vitreous veins, Structure: Fine-grained aphanitic with crystalline vein fill.

Identified March 31, 2026More igneous or sedimentary →

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Physical properties

Hardness: 5-7 (Mohs scale), Color: Dark grey to black matrix with white or cream streaks, Luster: Dull/Earthy matrix with Vitreous veins, Structure: Fine-grained aphanitic with crystalline vein fill.

Formation & geological history

Formed when molten lava (basalt) cooled or sedimentary mud compacted, followed by tectonic stress creating cracks. Mineral-rich hot fluids (hydrothermal) filled these cracks with quartz or calcite, often during the Cenozoic or Mesozoic eras.

Uses & applications

Primarily used as pocket stones, decorative beach stones, and in New Age or lapidary collecting. Basalt itself is a major industrial aggregate for road construction.

Geological facts

Folklore suggests that if you find a stone with a single white line circling it completely, you can make a wish upon it. These are common shoreline finds due to the varying erosion rates between the hard veins and softer matrix.

Field identification & locations

Identify by looking for a dark, smooth, water-worn pebble bisected by distinct white mineral lines. Common on volcanic or glacial beaches in the Pacific Northwest, New England, and the United Kingdom.