Mineral/Sedimentary

Jasper (Green)

Silicon dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on the Mohs scale. Color: Green, often opaque. Luster: Vitreous, dull. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.58-2.91.

Hardness: 6
Color: Green, often opaque
Luster: Vitreous, dull

Identified June 4, 2026More mineral/sedimentary →

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Physical properties

Hardness: 6.5-7 on the Mohs scale. Color: Green, often opaque. Luster: Vitreous, dull. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.58-2.91.

Formation & geological history

Formed in sedimentary and metamorphic environments, typically from silica-rich fluids that precipitate or replace existing materials. The green color is often due to iron silicate impurities, such as chlorite.

Uses & applications

Commonly used in lapidary arts, jewelry, and as a decorative stone. Historically used for talismans and amulets.

Geological facts

Jasper is an opaque variety of chalcedony. It comes in many colors and patterns, and has been used by various cultures throughout history.

Field identification & locations

Identify by its hardness, opacity, and conchoidal fracture. Often found as water-worn pebbles in riverbeds or beaches. A common but popular stone for beginners.