igneous
Lava Stone (Basalt)
Vesicular Basalt
Hardness: 5-6 Mohs. Color: Black, dark gray, or charcoal. Luster: Dull/Earthy. Structure: Aphanitic with vesicles (voids). Specific gravity: 2.8-3.0.
- Hardness
- 5-6 Mohs
- Color
- Black, dark gray, or charcoal
- Luster
- Dull/Earthy
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Physical properties
Hardness: 5-6 Mohs. Color: Black, dark gray, or charcoal. Luster: Dull/Earthy. Structure: Aphanitic with vesicles (voids). Specific gravity: 2.8-3.0.
Formation & geological history
Formed through the rapid cooling of magnesium-rich and iron-rich lava exposed at or very near the Earth's surface. The pits (vesicles) are caused by gas bubbles trapped in the lava during solidification.
Uses & applications
Used extensively in jewelry (beads), essential oil diffusers, landscaping, aquarium filtration, and thermal therapy (hot stone massage).
Geological facts
Lava stone is considered one of the oldest and most abundant rocks in the world. Because it comes from raw energy, it is often associated with the concept of rebirth and shedding unneeded emotional layers.
Field identification & locations
Identify by its lightweight feel relative to size and the presence of small surface pits or holes. Commonly found in volcanic regions like Hawaii, Iceland, and Italy.
