Cordierite. A specimen of cordierite (magnesium aluminium silicate). The gemstone variety of cordierite is called iolite | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Natural History Museum, London |
Taille de l’image : | 4689 px × 3727 px |
Model Release : | Non requis |
Restrictions : | - |