Sedimentary/Mineral
Jasper
Cryptocrystalline quartz (SiO2)
Hardness 6.5-7, opaque, various colors often with patterns, vitreous to dull luster, cryptocrystalline, conchoidal fracture
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Physical properties
Hardness 6.5-7, opaque, various colors often with patterns, vitreous to dull luster, cryptocrystalline, conchoidal fracture
Formation & geological history
Formed from silica-rich sedimentary environments or volcanic ash deposits, often with impurities like iron oxide creating patterns.
Uses & applications
Commonly used in lapidary, jewelry making, ornamental objects, and crystal healing.
Geological facts
The specific pattern on this piece is often called 'orbicular' or 'poppy' jasper due to the spotty inclusions. Jasper is an aggregate of microgranular quartz and/or chalcedony.
Field identification & locations
Identified by its opacity, hardness (can scratch glass), and characteristic patterns. Found worldwide, often in areas with volcanic history.
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