mineral
Moss Agate
Chalcedony with inclusions
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: Clear to milky white base with green, brown, or red inclusions resembling moss or vegetation, Luster: Vitreous to waxy, Crystal structure: Cryptocrystalline, Cleavage: None, Specific gravity: 2.58-2.64
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Clear to milky white base with green, brown, or red inclusions resembling moss or vegetation, Luster: Vitreous to waxy, Crystal structure: Cryptocrystalline, Cleavage: None, Specific gravity: 2.58-2.64
Formation & geological history
Formed in cavities of volcanic rocks or from hydrothermal fluids, where silicon dioxide precipitates along with iron or manganese oxides, which form the branching inclusions.
Uses & applications
Used primarily as a gemstone in jewelry, for decorative carvings, and in lapidary arts. Also collected by rock enthusiasts.
Geological facts
Moss agate is not a true agate because it lacks the concentric banding typical of agates, but it is traditionally grouped with them due to its chalcedony composition.
Field identification & locations
Identifiable by its characteristic moss-like inclusions within a translucent to semi-transparent matrix. Found worldwide, with notable deposits in India, Brazil, Uruguay, and the USA.
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