mineral

Tree Agate (Dendritic Agate)

Silicon Dioxide (SiO2) with Manganese/Iron inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: White base with forest green moss-like or tree-like inclusions, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline quartz), Specific Gravity: 2.58-2.64

Hardness: 6

Identified May 5, 2026More mineral →

Explore Tree Agate (Dendritic Agate) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed through the cooling of silica-rich groundwater in the cavities of volcanic or metamorphic rocks. The green 'branch' patterns are created by manganese and iron oxides that seep into crevasses during formation. Most specimens date back millions of years to volcanic epochs.

Uses & applications

Primarily used for decorative carvings, jewelry (cabochons), and as a popular stone in crystal healing and metaphysical collecting.

Geological facts

Despite its name, Tree Agate is technically a variety of chalcedony rather than a true 'banded' agate. The branching green patterns are known as 'dendrites', a term derived from the Greek word for 'tree'.

Field identification & locations

Identify by its characteristic white and green speckled or branch-like appearance. Common locations include India, Brazil, and the USA. Collectors look for high contrast between the white quartz and the green inclusions.