mineral

Tree Agate

Silicon Dioxide (SiO2) with dendritic inclusions

Hardness: 6.5-7 Mohs; Color: White with green dendritic inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.60-2.65

Hardness: 6
Color: White with green dendritic inclusions
Luster: Vitreous to waxy

Identified May 10, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: White with green dendritic inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.60-2.65

Formation & geological history

Formed through the deposition of silica-rich groundwater in the cavities of volcanic or sedimentary rocks. The green 'branch-like' patterns are formed by manganese or iron oxide inclusions during the cooling process.

Uses & applications

Primarily used for decorative purposes, ornamental carvings, jewelry making (cabochons), and as a popular specimen in mineral collections and metaphysical practices.

Geological facts

Despite its name, Tree Agate is technically a dendritic chalcedony rather than a true agate, as it lacks the characteristic banding associated with agates.

Field identification & locations

Identify by the distinct green mossy or tree-like patterns on a white opaque background. Commonly found in Brazil, India, and the USA. It will not be scratched by a steel knife.

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