mineral

Tree Agate

Silicon Dioxide (SiO2) with inclusions of Chlorite or Manganese

Hardness: 6.5-7 on Mohs scale; Color: white to grayish-white with green dendritic inclusions; Luster: waxy to vitreous; Crystal system: Trigonal/Microcrystalline; Cleavage: none; Specific Gravity: 2.58-2.64

Hardness: 6
Color: white to grayish-white with green dendritic inclusions
Luster: waxy to vitreous

Identified July 9, 2026More mineral →

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Physical properties

Formation & geological history

Forms primarily in volcanic environments where silica-rich water fills cavities in igneous rocks, cooling slowly to form chalcedony with dendritic mineral inclusions from nearby soil or water.

Uses & applications

Mainly used for decorative purposes, lapidary arts, jewelry (cabochons and beads), and as a popular specimen for crystal healing collections.

Geological facts

Unlike its close relative Moss Agate which is translucent, Tree Agate is typically opaque. The name comes from the green 'branch-like' patterns that resemble foliage or forest landscapes.

Field identification & locations

Identify by its opaque white quartz base and distinctive forest-green mossy inclusions. Often found in riverbeds or near ancient volcanic sites in India, Brazil, and the USA. Collectors look for high contrast between the white and green.

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Metamorphic

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Mineral

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Mineral/Rock