10.7" Colorful Polished Free-Standing Jasper Formation - Madagascar

Jasper

Jasper is a fairly general term that can refer to any opaque variety of chalcedony or aggregation of microcrystalline quartz (crystals too small to be individually visible). Jaspers can be quite colorful due to mineral impurities in the silica, and are typically multi-colored. Reds, oranges and browns caused by iron oxide impurities are the most common colors.

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