Polychrome jasper auricular skin#

This jasper was recently discovered in China. It is reasonably common to find cavities left by decomposed belemnite casts or in some rare cases impression of ammonites which makes it a fossil filled sedimentary rock. This stone is mined in the West and Central part of Africa. When the colors are in stripes or bands, it is called striped or banded jasper.īelow is a list and some pictures of the many jaspers we’ve used in our designs in the past years. Healed, fragmented rock produces brecciated jasper.

Polychrome jasper auricular skin#

Diffusion from a center produces a distinctive orbicular appearance like with Leopard Skin Jasper, or linear banding from a fracture as seen in Leisegang Jasper. Picture jaspers exhibit combinations of patterns such as banding from flow or depositional patterns from water or wind, dendritic or color variations resulting in what appear to be scenes or images, on a cut section. Weathering, with time, will create intensely colored superficial rinds.

The original materials are often fractured and distorted after deposition, into myriad beautiful patterns which are to be later filled with other colorful minerals. Jasper can be modified by the diffusion of minerals along discontinuities providing the appearance of vegetative growth also known as dendritic inclusions. Then there are inappropriately named materials, for example 'Ocean Jasper' from Madagascar is really a chalcedony, as is Bloodstone from India. Terms attributed to various well-defined materials includes the geographic locality where it is found while others are named after the appearance. The classification and naming of jasper presents an enormous challenge. Jasper is known to have been a favorite gem in the ancient world its name can be traced back in Hebrew, Assyrian, Persian, Greek and Latin. The name jasper means 'spotted or speckled stone'. Patterns arise during the consolidation process forming flow and depositional patterns.

The color stems from the mineral content of the original sediments or ash. Jasper is an opaque, impure variety of silica, usually red, yellow, brown, green or blue in color.