sedimentary
Yellow Jasper
Microcrystalline Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, opaque yellow color with brownish mottling, and a vitreous to dull luster.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque yellow color with brownish mottling, and a vitreous to dull luster.
Formation & geological history
Forms through the hydrothermal deposition of silica-rich fluids or alteration of sedimentary deposits, often during ancient volcanic activity.
Uses & applications
Widely used for ornamental carvings, polished crystal towers, jewelry, and lapidary collections.
Geological facts
Jasper has been utilized since ancient times for talismans and decorative seals due to its durability and rich coloration.
Field identification & locations
Identified by its conchoidal fracture, microcrystalline structure, and distinctive opaque yellow coloration. Commonly sourced from India, Madagascar, and the USA.
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