Thin section polarised light micrograph of a rock containing tourmaline (or turmaline) crystals in a graphic pattern. Like in the better-known graphic granite this pattern results from the simultaneous crystallization of two or more minerals in a melt at a critical temperature, the eutectic point, during cooling of that melt. Actual size is 35 x 48 mm. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 8394 px × 6660 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |