sedimentary

Orange Moss Agate / Carnelian Agate

Silicon dioxide (SiO2) - variety Chalcedony

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale. Color: Translucent orange to white. Luster: Vitreous to waxy. Crystal system: Hexagonal (trigonal) microcrystalline. Cleavage: None, exhibits conchoidal fracture.

Hardness: 6
Color: Translucent orange to white
Luster: Vitreous to waxy

Identified June 23, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 on Mohs scale. Color: Translucent orange to white. Luster: Vitreous to waxy. Crystal system: Hexagonal (trigonal) microcrystalline. Cleavage: None, exhibits conchoidal fracture.

Formation & geological history

Formed in volcanic and metamorphic environments as a primary precipitate from silica-rich groundwater filling cavities (vugs) in volcanic lava flows or sedimentary rocks. This formation often takes millions of years as layers of silica accumulate.

Uses & applications

Used extensively in jewelry (cabochons, beads), decorative carvings, paperweights, and metaphysical collections.

Geological facts

Agate has been used by ancient civilizations for over 3,000 years for protective amulets and seals. It is named after the Achates River in Sicily where it was first discovered.

Field identification & locations

Identify in the field by its waxy luster, translucency, and inability to be scratched by a steel knife. Common locations include Brazil, India, and the Pacific Northwest of the USA.