mineral
Fancy Jasper
Silicon Dioxide (SiO2)
Hardness (Mohs scale): 6.5-7, Color: Multi-colored bands (red, green, grey, purple), Luster: Vitreous to waxy, Crystal structure: Trigonal (Microcrystalline), Cleavage: None, Specific Gravity: 2.58-2.91
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Physical properties
Hardness (Mohs scale): 6.5-7, Color: Multi-colored bands (red, green, grey, purple), Luster: Vitreous to waxy, Crystal structure: Trigonal (Microcrystalline), Cleavage: None, Specific Gravity: 2.58-2.91
Formation & geological history
Formed via the deposition of silica from water or hydrothermal solutions into volcanic cavities or sedimentary crack filling. Color variations are due to mineral impurities like iron (red) and chlorite (green).
Uses & applications
Primarily used for decorative purposes, cabochons in jewelry, tumbling, and metaphysical practices.
Geological facts
Jasper is an opaque variety of chalcedony. The name 'Jasper' is derived from the Greek word 'iaspis', meaning 'spotted stone.'
Field identification & locations
Look for a smooth, waxy surface and opaque opacity. Found globally, with significant deposits in India, Brazil, and the USA. It will not scratch with a steel knife.
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Mineral/Rock
Banded Gneiss (River Rock/Pebble)
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Metamorphic Rock
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Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral