mineral

Tree Agate

Silicon Dioxide (SiO2) with Chlorite inclusions

Hardness: 6.5-7 (Mohs scale); Color: White or milky base with green dendritic or moss-like inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture).

Hardness: 6
Luster: Vitreous to waxy

Identified July 12, 2026More mineral →

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Physical properties

Formation & geological history

Formed by the deposition of silica from groundwater in the cavities of igneous rocks. The characteristic green 'branches' are manganese or iron oxide inclusions, or in this case, silicate minerals like chlorite, that grew in dendritic patterns.

Uses & applications

Primarily used for lapidary purposes, such as tumbled stones, beads, cabochons for jewelry, and as a decorative or 'healing' stone in metaphysical practices.

Geological facts

Unlike 'Moss Agate,' which is translucent, Tree Agate is typically opaque and characterized by a snowy white background. It has been used for centuries as a talisman to promote agricultural abundance.

Field identification & locations

Identify by its opaque white body and deep green branching patterns. Commonly found in Brazil, India, and the USA. Collectors look for a high contrast between the white and green and a smooth polish.

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