igneous
Basalt with Quartz Veins
Basalt with Quartz or Calcite Veining
AI-generated identification · may be incorrectDark gray to black, fine-grained igneous rock with thin white intersecting lines. Hardness is typically 5.5 to 6 on the Mohs scale. Luster is dull to slightly shiny when tumbled or polished.
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Physical properties
Dark gray to black, fine-grained igneous rock with thin white intersecting lines. Hardness is typically 5.5 to 6 on the Mohs scale. Luster is dull to slightly shiny when tumbled or polished.
Formation & geological history
Formed from the rapid cooling of basaltic lava at or near the surface. The white veins are typically formed later by hydrothermal fluids depositing minerals like quartz or calcite into fractures.
Uses & applications
Often collected as river rocks, used in landscaping, or tumbled for decorative purposes. In metaphysical communities, sometimes called 'wishing stones' if a single continuous vein wraps around the stone.
Geological facts
Basalt is the most common volcanic rock type on Earth and forms the oceanic crust.
Field identification & locations
Easily identified by its dark, fine-grained matrix and contrasting light-colored veins. Found globally, especially in areas with past volcanic activity or in riverbeds where they have been naturally smoothed.
