mineral

Moss Agate

Silicon Dioxide (SiO2) with Chlorite/Hornblende inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Clear to milky white with green, dendritic (plant-like) inclusions; Luster: Vitreous to waxy; Crystal Structure: Trigonal (Cryptocrystalline)

Hardness: 6
Luster: Vitreous to waxy

Identified July 2, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Clear to milky white with green, dendritic (plant-like) inclusions; Luster: Vitreous to waxy; Crystal Structure: Trigonal (Cryptocrystalline)

Formation & geological history

Forms through the deposition of silica in fissures or cavities of volcanic rocks. The 'moss' patterns are caused by filamentous inclusions of minerals like manganese or iron oxides, often found in Cenozoic era volcanic deposits.

Uses & applications

Commonly used in jewelry (cabochons, beads), decorative carvings, and as a popular collector's stone.

Geological facts

Despite its name, moss agate does not contain organic matter; the green patterns are strictly mineral-based. It has been used historically as a talisman for gardeners and agricultural wealth.

Field identification & locations

Identify by its translucent body combined with dark green branching patterns. Look for it in riverbeds or gravel deposits in volcanic regions like India, Brazil, and the western United States.