sedimentary
Green Jasper / Chert
Microcrystalline Quartz (SiO2)
Hardness of 6.5 to 7 on the Mohs scale, predominantly green color with mottled or speckled texture, waxy to vitreous luster, cryptocrystalline or microcrystalline structure, conchoidal fracture with no distinct cleavage, and a specific gravity of around 2.60 to 2.65.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, predominantly green color with mottled or speckled texture, waxy to vitreous luster, cryptocrystalline or microcrystalline structure, conchoidal fracture with no distinct cleavage, and a specific gravity of around 2.60 to 2.65.
Formation & geological history
Formed through the accumulation of silica-rich marine organism remains or chemical precipitation from hydrothermal or silica-saturated solutions in marine environments, undergoing diagenesis over millions of years.
Uses & applications
Commonly used for lapidary work, cabochons, ornamental carvings, decorative objects, and as a collector's specimen.
Geological facts
Jasper has been used since ancient times for tools, seals, and ornamentation. Green varieties are often associated with balancing energy in metaphysical traditions.
Field identification & locations
Can be identified in the field by its hardness (scratches glass), waxy luster, smooth weathered exterior, and lack of visible crystal grains. Found globally in riverbeds, marine sedimentary formations, and ancient ocean deposits.
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