12.2" Polished Outback Jasper - Western Australia

This is a beautiful, 12.2" wide, cut/polished section of Outback Jasper from Western Australia. The specimen will be accompanied by an acrylic display stand for preferred presentation.

Outback jasper occurs as a narrow seam within a ridge of banded iron formation.
Jasper is a term that can be applied to an opaque variety of chalcedony (light does not pass through it). The opaqueness is due to a higher concentration of impurities mixed with silica/quartz. Like agate it may form in a wide variety of colors, and is often multi-colored. In most cases, jasper will occur when silica-rich fluids permeate throughout a soft sediment or volcanic debris deposit. The fluids then crystallize around the particles/impurities, resulting in a cementation process. Most often, the impurities present determine the coloration of the deposit following solidification, however other factors can play a role in the color of what is now considered a jasper.
Chalcedony var. Jasper
Paynes Find, Western Australia
12.2 x 5", .9" thick