9.3" Polished Jasper Slab - Unknown Location

This is an interesting, 9.3" wide, polished slab of jasper from an unknown location. The polisher found this material in a box from an old estate. He was unable to ID the location this material came from, and even an expert on jaspers was stumped. Regardless of origin, it's a beautiful piece.

It comes with an acrylic display stand.

Jasper is a term that can be applied to an opaque variety of chalcedony. The opaqueness is due to a higher concentration of impurities mixed with silica/quartz compared to other varieties of silica, such as quartz or agates. Like agate it may form in a wide variety of colors, and is often multi-colored. In most cases, jasper forms 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, but other factors can play a role in the color of what is now considered a jasper.
Chalcedony var Jasper
9.3 x 5.2", .5" thick