Datolite is a calcium boron hydroxide nesosilicate, chemical formula CaBSiO4. Crystal system is monoclinic and one variety forms clear prismatic crystals that range from lustrous and sparkly to more frosted, as seen in this specimen from Lane's mine in Westfield, USA. Actual width is 105 mm. Another variety of datolite, as seen in this specimen, occurs in botryoidal or nodular masses that are a dull black on the outside and clearly-white microcrystalline inside. Provenance is in the vicinity of Arendal, in Norway. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 4469 px × 3744 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |