sedimentary

Moss Agate

Silicon dioxide with mineral inclusions (SiO2)

AI-generated identification · may be incorrect

Hardness of 6.5 to 7 on the Mohs scale. Displays green dendritic or moss-like inclusions of hornblende or chlorite within transparent to translucent chalcedony. Vitreous luster with conchoidal fracture and no cleavage.

Identified November 10, 2026More sedimentary →

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Physical properties

Formation & geological history

Forms from the weathering of volcanic rocks, where silica-rich groundwater fills cavities and deposits microscopic quartz crystals along with trapped metallic oxides.

Uses & applications

Widely used in lapidary arts, tumbled stones, ornamental carvings, and jewelry such as rings and pendants.

Geological facts

Despite its name, moss agate contains no actual organic matter; the green patterns are purely mineral deposits resembling plant foliage.

Field identification & locations

Easily identified by its distinctive green mossy inclusions inside translucent chalcedony. Found globally, notably in India, the United States, and Australia.