mineral

Tumbled Moss Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: translucent white/gray with green moss-like inclusions, Luster: vitreous to waxy, Crystal Structure: Trigonal (Microcrystalline)

Hardness: 6

Identified July 19, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale), Color: translucent white/gray with green moss-like inclusions, Luster: vitreous to waxy, Crystal Structure: Trigonal (Microcrystalline)

Formation & geological history

Forms in volcanic rock cavities or hydrothermal veins through the deposition of silica; green 'moss' structures are mineral inclusions that branch out during cooling.

Uses & applications

Commonly used in jewelry, beads, tumbling for collectors, and metaphysical practices.

Geological facts

Often called the 'gardener's stone' in folklore, moss agate is actually not a true agate because it lacks the concentric banding typically required for that classification.

Field identification & locations

Identified by its characteristic green dendritic (tree-like) patterns inside clear or milky chalcedony. Commonly found in India, Brazil, and the USA (notably Montana).