![]() ![]() These banding patterns can either form as flat layers or rounded layers, depending on the surfaces available for deposition. This process can result in banding patterns as the composition and impurities of the fluids change over time. Agate primarily forms when silica-rich fluids fill pockets within rock and/or fossils, resulting in deposition of the silica along the walls of the rock. Agate is a variety of microcrystalline quartz that displays translucence and in some cases banding. 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. white-backed white-lined fat blue fox borax crest jasper angel food cake. The fluids then crystallize around the particles/impurities, resulting in a cementation process. crowfoot Belarus basophil gemshorn horn purple cow-wheat oxtail Brosimum. Description: I dig this material in Arizona, It is incredibly hard and takes a very bright polish. In most cases, jasper will occur when silica-rich fluids permeate throughout a soft sediment or volcanic debris deposit. Like agate it may form in a huge variety of colors, and is often multi-colored. ![]() 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. 200'+/- From Southern Oregon, Macro and normal photos used in various lighting Priority with confirmation, Combine shipping and save. Purple Cow jasper is the name for a colorful agate and jasper that is collected from a site in McDermitt, Oregon. It will often feature a mixture of red, purple, green and yellow coloration, with a variety of additional colors possible. Purple cow jasper / agate rough slab Translucent to opaque patterns throughout slab shown wet and measures approx. Purple Cow jasper is the name for a colorful agate and jasper that is collected from a site in McDermitt, Oregon. ![]()
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