Almandine crystals. Almandine is the iron-alumina variety of the garnet group of minerals. Its characteristic colour is a brownish red,though it can tend towards purple and violet. It occurs in schists and other metamorphic rocks,often in the well-developed rhombic dodecahedral shapes,as seen here,with individual crystals the size of large marbles | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 5138 px × 3425 px |
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