sedimentary

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7.0 (Mohs scale), Color: Sage to deep green, Luster: Dull to waxy, Crystal Structure: Microcrystalline/Trigonal, Specific Gravity: 2.6-2.9

Hardness: 6

Identified May 4, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7.0 (Mohs scale), Color: Sage to deep green, Luster: Dull to waxy, Crystal Structure: Microcrystalline/Trigonal, Specific Gravity: 2.6-2.9

Formation & geological history

Formed from the deposition of silica-rich fluids within cracks or volcanic ashes, often associated with hydrothermal activity or sedimentary environments.

Uses & applications

Primarily used for lapidary work, jewelry (cabochons), polished river stones, and as a decorative collector's piece.

Geological facts

The green color typically comes from inclusions of silicate minerals like chlorite or actinolite. It has been used since ancient times for amulets and seals.

Field identification & locations

Identify by its 'conchoidal' (shell-like) fracture and high hardness (it cannot be scratched by a steel knife). Commonly found in riverbeds and mountainous terrain in regions like California, Oregon, and India.