Iron dendrites in agate

Iron dendrites in agate

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Credit: DIRK WIERSMA/SCIENCE PHOTO LIBRARY

Caption: Iron dendrites in agate. Slice of white agate with dendrite crystals of iron oxide. Agate is silica (silicon dioxide) that precipitated from liquid inside existing rock. Impurities within agate (in this case, iron oxide) can give the mineral a wide range of colours. Fine specimens of agate are found in Brazil Italy and Germany.

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Keywords: agate, chalecodony, close-up, cross-section, crystal, crystals, dendrites, dendritic, earth science, formation, formations, geological, geology, half, halved, iron oxide, mineral, pattern, patterned, patterns, polished, quartz, rock, section, semi-precious, silica, silicon dioxide, slice, sliced, stone, white

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