This Specimen has been sold.
6" Polished Coquina Jasper Slab - India
This is a beautiful, 6" wide polished slab of coquina jasper from the Himalayan Mountains of India. The polishing is wonderful, with no dull spots or scuff marks. An absolutely interesting and gorgeous piece. Comes with an acrylic display stand.
Coquine jasper, also known as "Arabic Script Jasper", "Elephant Skin Jasper" or " Mariam Jasper", is believed to be a fossiliferous jasper. The dark brown mineralization is silica-rich mud (jasper), surrounding various sea grass and fossils. The orange coloration is a result of iron oxidation.
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.