mineral

Jasper Agate (Carnelian Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions

Hardness: 6.5-7 on Mohs scale; Color: Red, orange, and white mottled patterns; Luster: Waxy to vitreous; Crystal structure: Microcrystalline/Cryptocrystalline; Cleavage: None (conchoidal fracture).

Hardness: 6
Color: Red, orange, and white mottled patterns
Luster: Waxy to vitreous

Identified June 10, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Red, orange, and white mottled patterns; Luster: Waxy to vitreous; Crystal structure: Microcrystalline/Cryptocrystalline; Cleavage: None (conchoidal fracture).

Formation & geological history

Formed via the deposition of silica from groundwater in volcanic rock cavities or sedimentary layers. The red coloration is caused by the presence of hematite or other iron oxides during the formation process.

Uses & applications

Primarily used for lapidary work, jewelry (cabochons and beads), decorative carvings, and as a popular specimen for rock tumbling and collecting.

Geological facts

Agate and Jasper are both varieties of chalcedony; the distinction is usually based on translucency—Agate is translucent, while Jasper is opaque. This specimen shows a mix of both properties.

Field identification & locations

Identify by its waxy feel, hardness (it will scratch glass), and vibrant iron-red patterns. Often found in riverbeds or areas with historic volcanic activity like the Pacific Northwest or Lake Superior regions.

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