Pumice is a special rock structure formed by volcanic activity. It is the only type of rock that naturally floats in water. The fragile structure of pumice lends itself well to skin and fabric treatment where dirt, oils and other residues need gentle, but effective washing. The ingredients in pumice are all-natural and non-toxic.
Formation
Pumice is hardened volcanic lava formed by "volatiles," which are a combination of water and gases. The interaction of escaping gases during the lava's cooling process gives the pumice extensive sponge-like airways throughout the rock. Thus, pumice consists largely of air, giving it a light weight.
Ingredients
Pumice is a "rhyolite," a type of volcanic rock. This particular type of rock consists of the compound silica. The relatively low levels of other common rock ingredients in rhyolite, such as iron and magnesium, help to give pumice its characteristic softness and light color.
Uses
Pumice is uncharacteristically soft for a rock, yet it retains the abrasiveness of a rock. This makes it well-suited to certain applications. When fragments of pumice are added to soap, the result is an abrasive cleaner that may more effectively remove dead or damaged surface layers of the skin as well as grease, oils, or dirt. Some hand cleaners also contain pumice. It may also clean certain clothing fabrics, such as blue jeans. Pumice works well in other environments as well, including the manufacture of concrete.
Resources
Pumice is a fragile rock and its natural form is easily damaged. Useful pumice resources exist in areas with relatively recent volcanic activity where the resulting pumice has had minimal exposure to the elements. Such volcanic fields exist in dozens of countries, with Italy the most prominent. The southwest United States is also home to many pumice deposits.
Calluses
A callus is a hardened, damaged part of the skin that can cause considerable pain. Calluses usually develop on the feet. Untreated calluses may lead to severe impairment and require special shoes and therapy. A pumice stone is an effective treatment for scrubbing away the layers of skin that form on a callus. Both the skin and the stone should be wet for this task. Individuals who suffer from diabetes should especially consider pumice for this purpose. The American Diabetes Association notes that those with diabetes are more prone to callus development. Daily treatment with pumice may help relieve the symptoms of calluses.
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