This is a gorgeous, 4.5" wide section of a type of picture jasper found in Northern Humboldt County, Nevada. It features beautiful bands and swirls of golden jasper, with a flat layer of blue-grey sedimentary rock along one edge.
Comes with an acrylic display stand.
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 much larger amount of impurities mixed with silica/quartz. Like agate it may form in a huge 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.