Tree Agate

Physical Properties

Hardness: 6.5-7 (Mohs); Color: White with green dendritic/branch-like patterns; Luster: Vitreous to waxy; Crystal Structure: Trigonal (Microcrystalline); Cleavage: None; Specific Gravity: 2.58-2.64

Formation & Geological History

Formed in cavities of volcanic rocks where silica-rich groundwater deposits layers of chalcedony. The green patterns are dendritic inclusions of Chlorite or Manganese minerals.

Uses & Applications

Primarily used for ornamental carvings, polished spheres, jewelry (cabochons), and as a popular specimen for crystal collectors.

Geological Facts

Unlike Moss Agate which is translucent, Tree Agate is typically opaque white. The name is derived from the Greek word 'dendros' meaning tree, referring to its plant-like inclusions.

Field Identification & Locations

Identified by its opaque white base and distinct green veining that looks like moss or foliage. Common locations include Brazil, India, and the USA.

Identified on: 4/29/2026

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