mineral

Tree Agate

SiO2

Hardness: 6.5-7 on the Mohs scale. Color: White base with green dendritic or moss-like inclusions. Luster: Vitreous to waxy. Crystal structure: Cryptocrystalline (chalcedony). Cleavage: None. Specific gravity: 2.58-2.64.

Hardness: 6
Color: White base with green dendritic or moss-like inclusions
Luster: Vitreous to waxy

Identified April 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed in cavities of volcanic rocks or ancient lavas. The green dendritic patterns are typically formed by iron or manganese oxide inclusions. Geographical age can vary widely.

Uses & applications

Used primarily in lapidary arts for cabochons, beads, carvings, and polished spheres (like the one in the image). It is also popular in crystal healing and metaphysical practices.

Geological facts

Tree Agate is often confused with Moss Agate, but Tree Agate is typically opaque white with green inclusions, whereas Moss Agate is often translucent.

Field identification & locations

Identify by its opaque white background with distinct green, plant-like (dendritic) patterns. Commonly found in India, Brazil, Uruguay, and parts of the USA. Relatively abundant, so it's a great stone for beginners.