Picasso Jasper

Jasper is an opaque species of chalcedony, which is a microcrystalline variety of quartz minarle. It often contains an abundance of impurities, and therefore some consider it a rock rather than a mineral.
Chemical composition: SiO2 + Fe, O, H, Si Silicon dioxide
Hardness: 7
Density: 2,65-2,70 g/cm³
Family:
Origin: USA

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