sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, opaque green color due to iron impurities, vitreous to dull luster, cryptocrystalline structure with conchoidal fracture, specific gravity of 2.58 to 2.91.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, opaque green color due to iron impurities, vitreous to dull luster, cryptocrystalline structure with conchoidal fracture, specific gravity of 2.58 to 2.91.
Formation & geological history
Forms from the accumulation of silica-rich sediments or volcanic ash, often precipitated from hydrothermal fluids or marine environments over millions of years.
Uses & applications
Used in ornamental carvings, cabochons, beads, lapidary arts, and collected by rockhounds.
Geological facts
Jasper has been used since ancient times for talismans, seals, and weaponry. Green varieties are often associated with tranquility and grounding.
Field identification & locations
Identified by its rich green color, waxy-to-vitreous luster, and high hardness which prevents it from being scratched by steel. Commonly found in riverbeds, beaches, and mountainous regions worldwide.
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