Polished sphere of Orbicular Jasper so named on account of the characteristic rounded forms (orbicules) often seen in this rock. It is also known as O

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Polished sphere of Orbicular Jasper so named on account of the characteristic rounded forms (orbicules) often seen in this rock. It is also known as Ocean Jasper . It is a mainly siliceous (SiO2) rock, comparable to agate or chalcedony, that was precipitated in a rhyolitic volcanic environment. Provenance is from a renowned location in Northern Madagascar. Actual diameter of sphere is 220 mm.

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Size: 4637px × 3769px
Photo credit: © DIRK WIERSMA/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: agate, chalcedony, earth, geological, geology, jasper, madagascar, mineral, mineralogy, northern, ocean, orbicules, polished, quartz, rhyolite, rock, sciences, volcanism