mineral
Tree Agate
Silicon Dioxide (SiO2) with Chlorite inclusions
Hardness: 6.5-7 Mohs; Color: White to grayish-translucent with green dendritic (tree-like) inclusions; Luster: Vitreous to waxy; Structure: Hexagonal/Cryptocrystalline; Cleavage: None.
- Hardness
- 6
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 Mohs; Color: White to grayish-translucent with green dendritic (tree-like) inclusions; Luster: Vitreous to waxy; Structure: Hexagonal/Cryptocrystalline; Cleavage: None.
Formation & geological history
Formed as a cryptocrystalline variety of quartz, where green chlorite or manganese inclusions grow in branching patterns within volcanic rock cavities or fissures.
Uses & applications
Primarily used for lapidary work including tumbled stones, cabochons for jewelry, decorative carvings, and as a popular specimen for crystal collectors.
Geological facts
Unlike its relative, Moss Agate, Tree Agate is typically characterized by a more opaque white background and more distinct, forest-like dendritic patterns.
Field identification & locations
Identify by its characteristic 'tree-like' or 'leaf-like' green spots on a white base. Often found in India, Brazil, and the USA. Collectors look for high contrast between the white quartz and deep green inclusions.
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