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Chemical formula
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KAl(SO 4 ) 2 ·12H 2 O |
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Crystalline system
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Cubic |
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Class
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Sulfates |
| Origin | Mohenjo-Daro, Pakistan |
| Size | 2.00-3.00cm |
natural alum.
Alum is a mineral that is obtained from a magmatic rock and occurs in nature in the form of a crystal. There is no industrial production of this compound.
Among its many uses, it is used to clarify cloudy water by placing it in filters where currents pass. It is used in the manufacture of paper and antiperspirants. In medicine, it causes bleeding to stop, since it causes cauterization of the vessels and, in turn, fibrosis of the mucosa.
Its use extends to many issues, but the truth is that its antiseptic properties are the best known. This is how it has become one of the most important natural deodorants that exist, among other jobs that are given to it. It is also used in some cultures as a preservative.
The mineral includes a label with the name and origin and is attached to a 4 cm square cardboard box.
*The price is per unit (a single cardboard box of the four shown in the image)
Since the minerals are natural, you will receive a piece similar to the one in the photograph. The minerals come in cardboard boxes and are glued to a porex base with hot silicone; these can be removed using ethyl alcohol without damaging the mineral. The size is approximate.