Amethyst crystals in a geode slice. Amethyst is a variety of quartz (silicon dioxide),the most abundant mineral in the Earth's crust. The purple colour is caused by impurities of iron or manganese. Amethyst is found in Europe,the Americas and Africa,with the finest specimens occurring in Mexico and South America. Amethyst is popular amongst jewellers and mineral collectors | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Kingcome, Gavin |
Taille de l’image : | 3800 px × 4434 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |