sedimentary

Green Jasper

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5–7 (Mohs scale); Color: Deep green to olive; Luster: Vitreous to waxy; Crystal structure: Microcrystalline/Cryptocrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.6–2.9

Hardness: 6
Color: Deep green to olive
Luster: Vitreous to waxy

Identified March 11, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the accumulation of fine siliceous materials in sedimentary environments or volcanic ash deposits where silica-rich fluids permeate the material over millions of years. This specimen appears to be a river-worn pebble.

Uses & applications

Commonly used in lapidary work, jewelry (cabochons and beads), ornamental carvings, and as a decorative stone in aquariums or landscaping.

Geological facts

Jasper has been used by humans for thousands of years; ancient civilizations used green jasper for seals and amulets. It is often referred to as the 'rain bringer' in Native American folklore.

Field identification & locations

Identify in the field by its opacity (unlike translucent chrysoprase), its smooth waxy feel, and its inability to be scratched by a steel knife. Commonly found in river beds and coastlines globally, notably in India, Brazil, and the Western USA.