|
Chemical formula
|
CaSO 4 ·2H 2 O |
|
Crystalline system
|
monoclinic |
|
Class
|
Sulfates |
| Origin | Cuenca, Spain |
| Size |
Medium : 3.0-4.0 cm big : 4.0-5.0cm |
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 piece you receive may differ slightly from the photo shown as the minerals are natural and no piece is identical. The size is approximate.