mineral

Tree Agate

Dendritic Agate (Silicon Dioxide - SiO2)

Hardness: 6.5-7 (Mohs scale), Color: White or grayish-white with green dendritic (tree-like) inclusions, Luster: Vitreous to waxy, Crystal Structure: Trigonal (Cryptocrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.64

Hardness: 6

Identified July 4, 2026More mineral →

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Physical properties

Formation & geological history

Formed in volcanic areas where groundwater rich in silica and manganese or iron oxides seeped into cracks and cavities within rocks, precipitating and forming dendritic patterns over millions of years.

Uses & applications

Predominantly used as a gemstone for jewelry (cabochons), ornamental carvings, tumbled stones for collectors, and in metaphysical practices as a stone of inner peace and connection to nature.

Geological facts

Tree agate is often confused with Moss Agate, but while Moss Agate is translucent with moss-like inclusions, Tree Agate is typically opaque and white with green branching patterns. The name 'dendrite' comes from the Greek word 'dendron' meaning tree.

Field identification & locations

Look for an opaque white quartz base with distinct, dark green fern-like or tree-branch-like patterns. It is commonly found in India, Brazil, and the USA. Collectors should check for the opacity and pattern clarity to distinguish it from moss agate.