Mineral Macro No. 42-27858646
by Bernardo Cesare - © Corbis. All Rights Reserved. - © Bernardo Cesare/Visuals Unlimited/Corbis
Thin section of an Ocean Jasper pendant from Madagascar
23 Feb 2011 --- Thin section of an Ocean Jasper pendant from Madagascar. It contains numerous orbicules or sperulites in a fine-grained silica matrix that resulted from the process of devitrification of a rhyolitic lava upon cooling. Polarized LM --- Image by © Bernardo Cesare/Visuals Unlimited/Corbis