mineral

Tree Agate

Silicon Dioxide (SiO2) with dendritic inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: White to milky translucent with dark green dendritic patterns; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Specific Gravity: 2.58-2.64.

Hardness: 6
Luster: Vitreous to waxy

Identified July 10, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: White to milky translucent with dark green dendritic patterns; Luster: Vitreous to waxy; Crystal Structure: Trigonal (microcrystalline); Specific Gravity: 2.58-2.64.

Formation & geological history

Formed through the cooling of silica-rich volcanic groundwater in rock crevices. The dendritic green patterns are formed by iron and manganese oxides or chlorite minerals that crystalize in tree-like patterns as the agate forms.

Uses & applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular specimen for crystal collecting and metaphysical purposes.

Geological facts

Unlike 'Moss Agate' which is generally more translucent, Tree Agate is typically opaque white. Despite its name, the 'dendrites' are not fosslized plants but inorganic mineral tracks.

Field identification & locations

Identify by its characteristic 'forest-like' green branching patterns against a stark white background. Found globally with major deposits in India, Brazil, and the USA. Collectors look for high contrast between the white and green.