mineral

Tree Agate

Silicon Dioxide (SiO2) with Chlorite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale), Color: White with green moss-like dendritic patterns, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Cleavage: None

Hardness: 6

Identified July 8, 2026More mineral →

Explore Tree Agate in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 6.5-7 (Mohs scale), Color: White with green moss-like dendritic patterns, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal), Cleavage: None

Formation & geological history

Formed through the cooling of volcanic lava where silica-rich groundwater seeps into cavities and minerals like chlorite create dendritic inclusions. Often found in India, Brazil, and the USA.

Uses & applications

Popular in lapidary work for cabochons, beads, and tumbled stones. Frequently used in jewelry making and as a collector's specimen for its unique patterns.

Geological facts

Unlike 'Moss Agate' which is translucent, Tree Agate is primarily opaque white with distinct branch-like patterns that resemble the foliage of a tree. It has been used since ancient times as a talisman for gardening and agriculture.

Field identification & locations

Identify by its opaque milky white base and dark green tree-like or fern-like branching patterns. It is heavy for its size and cannot be scratched by a steel knife.