4.8" Polished Willow Creek "Orb" Jasper Slab - Idaho

This is a polished Willow Creek orb jasper slap, collected from a location north of Eagle, Idaho. The interior is a colorful mixture of various jasper compositions that display blue, blue-green, green and red colorations.

This specimen 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
North of Eagle, Idaho
4.8" x 4.1", .75" wide