mineral

Green Moss Agate

Silicon Dioxide with inclusions (SiO2)

Hardness: 6.5-7 Mohs; Color: Translucent to semi-transparent with dark green dendritic inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture).

Hardness: 6
Luster: Vitreous to waxy

Identified July 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from groundwater in the cavities of igneous rocks. The green dendritic inclusions are typically manganese or iron oxides that have grown in patterns resembling moss or foliage.

Uses & applications

Primarily used for jewelry such as cabochons and beads, as well as for decorative items, ornamental carvings, and spiritual collection.

Geological facts

Despite its name, Moss Agate is not a true agate because it lacks the concentric banding required for that classification; it is technically a dendritic chalcedony. It has been known as the 'gardener's stone' for centuries.

Field identification & locations

Look for translucent chalcedony containing dark green, moss-like inclusions. It is commonly found in India, Brazil, and the western United States. Tumbled specimens feel smooth and cool to the touch.

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