Mineral
Tree Agate
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale. Opaque white chalcedony with green dendritic or moss-like inclusions. Vitreous luster.
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Physical properties
Hardness of 6.5-7 on the Mohs scale. Opaque white chalcedony with green dendritic or moss-like inclusions. Vitreous luster.
Formation & geological history
Formed in volcanic rocks through the deposition of silica from aqueous solutions, with secondary minerals (usually chlorite, hornblende, or other green minerals) creating the tree-like patterns.
Uses & applications
Primarily used as a lapidary material for jewelry, carving, and ornamental objects.
Geological facts
Tree agate is closely related to moss agate, but is distinguished by its opaque white base, whereas moss agate has a translucent or clear base.
Field identification & locations
Identified by its contrasting green 'tree' patterns against a solid white background. Commonly found in India, Brazil, Uruguay, and the USA. It takes a high polish and is popular among lapidaries.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary