Rock Identifier
Jasper (Microcrystalline Quartz (SiO2)) — mineral
mineral

Jasper

Microcrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on the Mohs scale. Color: predominantly red, orange, brown, with dark green or black inclusions. Luster: vitreous to waxy. Crystal structure: trigonal (microcrystalline).

Hardness
6
Luster
vitreous to waxy
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Physical properties

Hardness: 6.5-7 on the Mohs scale. Color: predominantly red, orange, brown, with dark green or black inclusions. Luster: vitreous to waxy. Crystal structure: trigonal (microcrystalline).

Formation & geological history

Forms from silica-rich fluids in sedimentary or volcanic environments, often with iron inclusions that give it its red/orange color.

Uses & applications

Commonly used for lapidary work, tumbling, carving, and ornamental jewelry.

Geological facts

Jasper is an opaque, impure variety of silica. The red color is typically due to iron inclusions.

Field identification & locations

Identified by its opacity, hardness, and conchoidal fracture. Often found as river rocks or in sedimentary deposits.

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