mineral

Jasper

Microcrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale. Color: Highly variable, often red, brown, yellow, or green. Luster: Vitreous to dull. Crystal structure: Trigonal (microcrystalline). Cleavage: None. Specific gravity: 2.5-2.9.

Hardness: 6
Color: Highly variable, often red, brown, yellow, or green
Luster: Vitreous to dull

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Forms from the deposition of silica in sedimentary environments or hydrothermal veins. It is an opaque, impure variety of silica.

Uses & applications

Commonly used in lapidary, jewelry making, and as a decorative stone.

Geological facts

Jasper derives its name from Old French 'jaspre', meaning 'spotted or speckled stone'. It has been used for ornaments and seals since ancient times.

Field identification & locations

Identified by its opacity, hardness (can scratch glass), and colorful, often patterned appearance. Commonly found worldwide, especially in volcanic and sedimentary rocks.