This Specimen has been sold.
4.6" Polished Maligano Jasper Slab - Indonesia
This is a maligano jasper slab that has been cut and polished to a glossy finish. Maligano jasper is the trade name for a brecciated yellow, orange, red, grey and blue-grey jasper that comes out of Indonesia. Most of these specimens contain rivers of agate that filled in the gaps between the brecciated jasper. Many times these specimens contain dendritic inclusions throughout the jasper.
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.