mineral
Tumbled Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
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
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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).
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