sedimentary

Jasper with Agate and Quartz Inclusions

Silicon Dioxide (SiO2) - Chalcedony / Quartz aggregate

AI-generated identification · may be incorrect

Hardness: 6.5–7 on Mohs scale; Color: Multicolored with earthy reds, browns, and translucent whites; Luster: Waxy to vitreous; Crystal Structure: Cryptocrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.6–2.9

Hardness: 6
Luster: Waxy to vitreous

Identified March 7, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the precipitation of silica-rich fluids within volcanic host rocks or sedimentary basins. Voids and fractures are filled over millions of years by microcrystalline quartz (jasper) and banded chalcedony (agate).

Uses & applications

Used primarily in lapidary arts for cabochons, jewelry making, and as a decorative specimen for collectors.

Geological facts

Jasper is often referred to as the 'Supreme Nurturer.' This specific specimen shows 'plumose' or 'mossy' textures where iron or manganese oxides have mineralized into the quartz matrix, creating unique organic patterns.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), its opaque to translucent nature, and smooth, curved fracture surfaces. Found in abundance in the Western United States (Oregon, Idaho) and Brazil.