sedimentary

Green Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Hardness: 6.5-7 on the Mohs scale. Color: Olive green to dark green with possible banding. Luster: Vitreous to dull. Crystal Structure: Trigonal (microcrystalline). Cleavage: None (exhibits conchoidal fracture). Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Olive green to dark green with possible banding
Luster: Vitreous to dull

Identified August 3, 2026More sedimentary →

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Physical properties

Formation & geological history

Forms by the precipitation of silica-rich fluids in sedimentary environments or hydrothermal veins, often replacing organic material or filling cavities in volcanic rocks. Geological age varies widely depending on the deposit.

Uses & applications

Used in ornamental carvings, cabochons for jewelry, decorative objects, and as a collectible mineral specimen.

Geological facts

Jasper has been used since ancient times for talismans, seals, and weaponry (such as arrowheads). Green jasper specifically was historically associated with rain-making and agriculture in various cultures.

Field identification & locations

Can be identified in the field by its waxy luster, conchoidal fracture, and opacity combined with a green color and hardness that scratches glass. Found worldwide, notably in India, Russia, Brazil, and the USA.

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