Dyed Pumice

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.

Identified on: 4/13/2026

Mode: Standard