A sample of the acicular,or needle-like,form of gypsum (hydrated calcium sulphate). Gypsum is a common sedimentary evaporite (a mineral deposit of precipitated salt). It is used in the making of plaster of Paris for construction,as a retarder in Portland cement,as a flux for pottery and as a fertilizer | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Land, Martin |
Bildgröße: | 3855 px × 5069 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |