|
Chemical formula
|
CaSO 4 ·2H 2 O |
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Crystalline system
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monoclinic |
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Class
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Sulfates |
| Origin | Cuenca, Spain |
| Size | 2.0-3.0cm |
Crystallized red plaster.
Gypsum occurs in crystals, sometimes large, twinned in arrowheads and spearheads; also in masses and spatic aggregates.
It is a highly appreciated material in restoration, it contains few impurities and it is used to give the last finishing layer on the walls of buildings.
The mineral includes a label with the name and origin and is attached to a cardboard box. 4 cm square.
*The price is per unit (a single cardboard box of the four shown in the photo)
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.