sedimentary

Green Jasper

Silicon dioxide (SiO2)

Hardness: 6.5-7 on Mohs scale; Color: Dark green with possible earthy inclusions; Luster: Vitreous to waxy; Crystal structure: Microcrystalline/Cryptocrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.91

Hardness: 6
Color: Dark green with possible earthy inclusions
Luster: Vitreous to waxy

Identified June 9, 2026More sedimentary →

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 infiltration of silica-rich fluids into volcanic ash or fine-grained sediments. The green color is typically caused by silicate minerals like chlorite or iron inclusions.

Uses & applications

Used primarily in lapidary work for cabochons, beads, and decorative carvings. Culturally significant as a grounding stone in metaphysical practices.

Geological facts

Jasper is an opaque variety of chalcedony. Historically, green jasper was highly prized in the ancient world for its supposed ability to bring rain and drive away evil spirits.

Field identification & locations

Identify by its matte to waxy appearance, extreme hardness (it will scratch glass), and its characteristic smooth, curved conchoidal fractures. Commonly found in riverbeds or areas with historical volcanic activity.