Dravite mineral. Dravite is a mineral belonging to the tourmaline group and forms series with elbaite and schorl. Like all tourmalines it is trigonal,often occurring dispersed in its host rock,but sometimes forming fairly well faceted crystals of the dark honey-brown colour seen here. This sample,from St Lawrence County in New York State,USA,is 18 centimetres across | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 4686 px × 3780 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |