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Coquina Jasper Stone Polished 2.25 inch Sphere Rock A great sphere of Coquina Jasper from India! Coquina is a consolidated sedimentary rock of biochemical origin, mainly composed of mineral calcite, often including some phosphate, in the form of seashells or coral. Coquina forms near shore, where wave action is vigorous and sorts the sediments well. The Greek origin of the word jasper, iaspis, means "spotted stone." This form of chalcedony, or microcrystalline quartz, is usually red, brown or green. Its patterns are much less regular and defined than those of the other chalcedony variety, agate. Another difference between the two is that jaspers are generally opaque, while agates tend to be translucent (or at least contain translucent bands). This sphere is 2.25 inches in diameter. The material has natural tiny pits.E-mail a friend about this item.
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