igneous
Dyed Pumice
Vesicular Rhyolite (Artificial Coloration Addition)
Hardness: 5-6 (variable); Color: Vivid artificial purple (naturally grey/white); Luster: Dull/Earthy; Structure: Highly vesicular/porous; Specific Gravity: Very low (often floats in water).
- Hardness
- 5-6 (variable)
- Color
- Vivid artificial purple (naturally grey/white)
- Luster
- Dull/Earthy
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Physical properties
Hardness: 5-6 (variable); Color: Vivid artificial purple (naturally grey/white); Luster: Dull/Earthy; Structure: Highly vesicular/porous; Specific Gravity: Very low (often floats in water).
Formation & geological history
Formed from explosive volcanic eruptions where gas-rich lava cools rapidly, trapping bubbles. This specific specimen has been artificially treated with pigments or dyes after formation.
Uses & applications
Horticulture (soil aeration), decorative landscaping, foot scrubs (pedicure stones), and aquarium decor.
Geological facts
Natural pumice is the only rock that can float on water due to its air-filled pores. The bright purple color in this specimen is not a geological occurrence but a result of human-applied dye.
Field identification & locations
Identified in the field by its sponge-like texture and extreme lightness. Artificial colors like this purple are common indicators of retail or decorative sourcing rather than raw field collection.
