Sedimentary/Mineral

Jasper

Microcrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: Multicolored (browns, tans, cream, dark spots), Luster: Vitreous to dull, Crystal structure: Trigonal (microcrystalline), Cleavage: None

Hardness: 6

Identified June 18, 2026More sedimentary/mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: Multicolored (browns, tans, cream, dark spots), Luster: Vitreous to dull, Crystal structure: Trigonal (microcrystalline), Cleavage: None

Formation & geological history

Forms from silica-rich fluids in sedimentary environments or volcanic ash deposits, often replacing original organic material or filling cavities.

Uses & applications

Commonly used in jewelry making (cabochons, pendants), ornamental carvings, and lapidary work.

Geological facts

Jasper is an opaque variety of chalcedony. The complex patterns in this piece suggest it might be a brecciated or picture jasper variety.

Field identification & locations

Identified by its opacity, hardness (can scratch glass), and intricate banding or patterns. Found worldwide.

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