sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, green coloration due to iron impurities, waxy to dull luster, cryptocrystalline structure, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, green coloration due to iron impurities, waxy to dull luster, cryptocrystalline structure, conchoidal fracture with no true cleavage.
Formation & geological history
Forms from silica-rich fluids precipitating in sedimentary environments or hydrothermal veins, often over millions of years.
Uses & applications
Used for ornamental carvings, cabochons, lapidary art, and metaphysical purposes.
Geological facts
Jasper has been used since ancient times for talismans, seals, and jewelry by various civilizations including the Greeks, Romans, and Egyptians.
Field identification & locations
Found worldwide in riverbeds and mountainous regions. Identified easily by its hardness, opacity, and smooth, weathered appearance.
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