mineral

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Hardness: 6.5-7 on Mohs scale; Color: Clear to milky white with green dendritic or moss-like inclusions; Luster: Vitreous to waxy; Structure: Trigonal (Cryptocrystalline); Cleavage: None

Hardness: 6
Luster: Vitreous to waxy

Identified July 11, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Clear to milky white with green dendritic or moss-like inclusions; Luster: Vitreous to waxy; Structure: Trigonal (Cryptocrystalline); Cleavage: None

Formation & geological history

Formed from the weathering of volcanic rocks where hydrothermal fluids rich in silica and minerals like manganese and iron oxides fill fissures or cavities, creating dendritic inclusions over thousands of years.

Uses & applications

Primarily used in jewelry (beads, cabochons, pendants), ornamental carvings, and gathering for metaphysical or collector value.

Geological facts

Despite its name, moss agate does not contain organic matter; the 'moss' is actually mineral inclusions of manganese or iron. It has been used as a curative ornament in many cultures since Neolithic times.

Field identification & locations

Identify by its translucent chalcedony body and dark green, moss-like filament inclusions. Commonly found in India, Brazil, the USA, and China. Collectors look for high translucency and dense, intricate 'forest-like' patterns.