Dendritic crystals in chalcedony

Dendritic crystals in chalcedony

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Credit: DIRK WIERSMA/SCIENCE PHOTO LIBRARY

Caption: Dendritic crystals in chalcedony. Chalcedony (white) is a variety of the silicate mineral quartz that forms extremely small, fine crystals. It can occur in a variety of colours. This sample has a delicate dendritic (branching) pattern caused by iron oxide (orange) mineral deposits. The sample measures 27 millimetres tall.

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Keywords: chalcedony, cryptocrystalline, crystal, crystals, dendrite, dendrites, dendritic, earth science, geological, geology, iron oxide, mineral, mineralogy, pattern, patterned, quartz, rock, stone, white

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