sedimentary

Jasper (Polychrome Jasper)

Silicon Dioxide (SiO2) with various inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Earthy tones including tan, red, and grey; Luster: Dull to waxy; Crystal Structure: Microcrystalline (Trigonal); Cleavage: None; Opaque.

Hardness: 6
Color: Earthy tones including tan, red, and grey
Luster: Dull to waxy

Identified July 8, 2026More sedimentary →

Explore Jasper (Polychrome Jasper) in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 6.5-7 Mohs; Color: Earthy tones including tan, red, and grey; Luster: Dull to waxy; Crystal Structure: Microcrystalline (Trigonal); Cleavage: None; Opaque.

Formation & geological history

Formed when silica-rich fluids permeate porous sedimentary or volcanic rock, taking on pigment from mineral impurities like iron and manganese over millions of years. This specimen appears water-worn or tumbled.

Uses & applications

Used primarily in jewelry, lapidary arts, decorative items, and as a healing or meditation stone in metaphysical circles.

Geological facts

The name 'Jasper' is derived from the Greek word 'iaspis', meaning 'spotted stone'. This specific earthy variety is often called Polychrome or Desert Jasper when it displays multi-colored, desert-like banding.

Field identification & locations

Identify by its smooth, waxy feel, hardness (it will scratch glass), and its lack of transparency even on thin edges. Commonly found in riverbeds or arid desert regions worldwide, notably Madagascar.