sedimentary

Green Jasper (with Quartz veining)

Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2

AI-generated identification · may be incorrect

Hardness: 6.5–7 (Mohs scale); Color: Dark forest green with white/light-grey translucent veining; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.58–2.91

Hardness: 6
Color: Dark forest green with white/light-grey translucent veining
Luster: Vitreous to waxy

Identified March 28, 2026More sedimentary →

Explore Green Jasper (with Quartz veining) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed through the deposition of silica from water or hydrothermal fluids into rock cavities or through the replacement of organic materials. The color comes from iron silicate inclusions (celadonite or chlorite). Found in volcanic and sedimentary environments across various geological ages from Precambrian to recent.

Uses & applications

Commonly used in lapidary work for cabochons, beads, and decorative carvings. Used historically for cylinder seals and amulets. Significant in modern metaphysical collections and as aquarium/landscaping stone.

Geological facts

In medieval times, green jasper was known as a 'rain-bringer' and was believed to have the power to drive away evil spirits. The light-colored bands are likely quartz-filled fractures formed during tectonic stress.

Field identification & locations

Identify in the field by its waxy texture when wet, high hardness (cannot be scratched by a steel knife), and smooth conchoidal (shell-like) fracture surfaces. Commonly found in riverbeds or beaches where harder silica-rich rocks accumulate.