gemstone
Tree Agate
Cryptocrystalline quartz (Chalcedony), SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale. Displays white to translucent base colors with dendritic inclusions of green chlorite or hornblende.
Identified More gemstone →
Explore Tree Agate in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6.5 to 7 on the Mohs scale. Displays white to translucent base colors with dendritic inclusions of green chlorite or hornblende.
Formation & geological history
Forms in hydrothermal veins and cavities of volcanic and metamorphic rocks through the deposition of silica-rich groundwater over millions of years.
Uses & applications
Popularly used for decorative ornamental carvings, polished spheres, and metaphysical jewelry.
Geological facts
Despite its name, tree agate is not a fossilized plant; the green fern-like patterns are actually trapped mineral inclusions of iron and manganese.
Field identification & locations
Easily identified by its distinct green dendritic branching patterns embedded within white chalcedony. Commonly sourced from India, Brazil, and the USA.
More like this
Other gemstone specimens
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Topaz
Al2SiO4(F,OH)2
mineral
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary