mineral

Chrysoprase

Chalcedony (Silicon Dioxide, SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5–7; Color: Apple-green to deep green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.6

Hardness: 6
Color: Apple-green to deep green
Luster: Vitreous to waxy

Identified April 26, 2026More mineral →

Explore Chrysoprase 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; Color: Apple-green to deep green; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.6

Formation & geological history

Formed by the deep weathering or lateritization of nickeliferous serpentinites or other ultramafic rocks. The green color is caused by trace amounts of nickel.

Uses & applications

Primary use is in jewelry as cabochons or beads, and for ornamental carvings. It is the most valuable variety of chalcedony.

Geological facts

In ancient times, Chrysoprase was associated with Alexander the Great, who was said to always wear a belt decorated with it for victory in battle.

Field identification & locations

Identify by its distinct waxy luster and apple-green hue. Unlike emerald, which is colored by chromium, chrysoprase's color comes from nickel inclusions. Commonly found in Australia, Brazil, and Poland.