This Specimen has been sold.
12.5" Polished Banded Pinyalling Jasper (28 lbs) - Western Australia
This is a massive section of "pinyalling jasper", collected near an abandoned gold mining center of Fields Find Gold Mine in Western Australia. This material is composed of banded jasper with hematite impurities that give it its vibrant red, orange, and pink colors. One side has been cut flat and polished to a glossy finish to highlight the gorgeous coloration and banding. It sits upright nicely on multiple edges.
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 & Hematite
Near Fields Find Gold Mine, Pinyalling Hills, Western Australia
Size: 12.5 x 9.75 x 4", Weight: 28 lbs