Description
Pumice is sponge-like pyroclastic volcanic rock, with a very low density (i.e., below that of water), and light in color (i.e., white to gray), it may be glassy or dull, and fully riddled with holes. It is used as an abrasive (e.g., pumice stone, lava soap).
Chemical Properties
Grey-brown granular stones
Uses
Concrete aggregate, heat and sound insulation,
filtration, finishing glass and plastics, road construc-
tion, scouring preparations, paint fillers, absorbents,
support for catalysts, dental abrasive, abherent for
uncured rubber products, possible substitute for
asbestos, polishing agent for pedicures.
Definition
pumice: A porous volcanic rock thatis light and full of cavities due to expandinggases that were liberatedfrom solution in the lava while it solidified.Pumice is often light enoughto ?oat on water. It is usually acid(siliceous) in composition, and is usedas an abrasive and for polishing.
Application
In addition to its architectural and decorative applications, pumice also has various uses in the personal care and beauty industry. It is often used as an exfoliating agent in soaps, body scrubs, and foot treatments to remove dead skin cells and promote smooth and soft skin. The abrasive properties of pumice make it effective in removing calluses and rough patches on the feet.
Moreover, pumice stone is commonly used in the horticultural industry for the preparation of soil mixes. Its porous nature allows for adequate drainage and aeration, preventing waterlogging and providing a favorable environment for plant growth. Pumice is also frequently added to bonsai soil mixes to enhance the drainage abilities of the soil.
In summary, pumice stone is a versatile material that finds utility in a wide range of applications. Its properties as an abrasive agent, insulator, and lightweight aggregate make it valuable in industries such as construction, personal care, horticulture, and decoration.
Definition
A highly porous igneous rock, usually
containing 67–75% Si O2and 10–20% Al
2
O3, with a
glassy texture. Potassium, sodium, and calcium are
generally present. Insoluble in water, not attacked
by acids.
