mineral

Agate (Moss or Green Agate)

Silicon Dioxide (SiO2)

Hardness: 6.5-7 (Mohs scale). Color: Translucent green with mossy inclusions. Luster: Vitreous to waxy. Crystal Structure: Hexagonal (microcrystalline). Cleavage: None. Specific Gravity: 2.58-2.64.

Hardness: 6
Color: Translucent green with mossy inclusions
Luster: Vitreous to waxy

Identified June 22, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale). Color: Translucent green with mossy inclusions. Luster: Vitreous to waxy. Crystal Structure: Hexagonal (microcrystalline). Cleavage: None. Specific Gravity: 2.58-2.64.

Formation & geological history

Formed in volcanic rock cavities or sedimentary rocks through the deposition of silica from groundwater. The green color often comes from impurities like iron or manganese.

Uses & applications

A popular gemstone for jewelry (pendants, rings), decorative ornaments, and used in precision tools like mortars and pestles due to its hardness.

Geological facts

Agate is a variety of chalcedony. Moss agate is often called the 'gardener's stone' and is unique because it contains dendritic inclusions that look like organic plant matter.

Field identification & locations

Identify by its waxy luster, translucency, and lack of visible crystals. It is commonly found in riverbeds or volcanic regions like Brazil, India, and the USA (Pacific Northwest).