mineral

Moss Agate

Chalcedony (SiO2) with inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 on the Mohs scale, Color: clear to milky white with green, brown, or black inclusions resembling moss or ferns, Luster: Vitreous, Crystal structure: Cryptocrystalline, Cleavage: None, Specific gravity: 2.58-2.64

Hardness: 6

Identified September 3, 2026More mineral →

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Physical properties

Formation & geological history

Forms in volcanic rocks where silica-rich fluids deposit chalcedony in cavities. The 'moss' inclusions are typically manganese or iron oxides.

Uses & applications

Commonly used in jewelry, cabochons, and as a decorative stone. Valued by collectors for its unique patterns.

Geological facts

Despite its name, moss agate does not contain organic matter; the plant-like patterns are entirely inorganic mineral formations.

Field identification & locations

Identified by its distinctive dendritic or moss-like inclusions within a translucent chalcedony matrix. Commonly found in India, USA, and Brazil.

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