Mookaite Jasper 1
Australia
Macro photograph of a slab of polished Mookaite jasper from Western Australia. Formed approx. 125 million yrs ago, in part, from the fossilization of microscopic protozoa called radiolaria. Though it is called a jasper it is actually a type of sedimentary rock.
Image #3761. Photo © copyright by Mark Windom.