mineral

Tree Agate

Dendritic Agate (Silicon Dioxide, SiO2)

Hardness: 6.5-7 (Mohs scale); Color: White or translucent base with deep green forest-like mottled inclusions; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (Trigonal, microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.64

Hardness: 6
Luster: Vitreous to waxy

Identified March 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the infiltration of manganese or iron oxides into cracks in volcanic rocks or hydrothermal veins. The dendritic 'tree' patterns grow as crystals cool and consolidate within the quartz host. Significant deposits are aged from the Cenozoic era to older volcanic formations.

Uses & applications

Primarily used in lapidary arts for beads, cabochons, and ornamental carvings. It is popular in the metaphysical community and for budget-friendly jewelry like bracelets and pendants.

Geological facts

Unlike 'Moss Agate,' which has moss-like filaments, Tree Agate is characterized by more splotchy or branch-like green patterns against an opaque white background. It is chemically identical to quartz but physically distinct due to its mineral inclusions.

Field identification & locations

Identify by its characteristic 'dappled' green and white appearance and cold-to-the-touch feel (distinguishing it from plastic). It is commonly found in India, Brazil, and the USA. Collectors should look for high contrast between the white matrix and the green dendrites.