A sample of the Cockscomb form of siderite (iron carbonate). Siderite is an important iron mineral (containing about 48 percent iron) because it is free of sulphur and phosphorous and is sometimes rich in manganese | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Land, Martin |
Taille de l’image : | 5486 px × 4094 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |