Mineral (Variety of Chalcedony)
Tree Agate
Silicon Dioxide with Chlorite inclusions (SiO2)
Hardness: 6.5-7 (Mohs); Color: White or clear base with mossy green dendritic inclusions; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (Trigonal); Cleavage: None; Specific Gravity: 2.58–2.64.
- Hardness
- 6
- Color
- White or clear base with mossy green dendritic inclusions
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 (Mohs); Color: White or clear base with mossy green dendritic inclusions; Luster: Vitreous to waxy; Crystal Structure: Hexagonal (Trigonal); Cleavage: None; Specific Gravity: 2.58–2.64.
Formation & geological history
Formed in volcanic environments where mineral-rich water seeps into cracks in host rock. Over time, manganese or iron oxides (and in this case, chlorite) grow in branching patterns. Most deposits are found in areas with ancient volcanic activity.
Uses & applications
Primarily used for ornamental purposes, cabochons for jewelry, pocket stones, and decorative carvings. It is popular in the metaphysical community as a 'stone of inner peace'.
Geological facts
Unlike 'Moss Agate' which is translucent, Tree Agate is typically opaque and white with distinct, defined green 'dendrites'. It has been associated with agriculture and gardening since ancient times.
Field identification & locations
Identify in the field by its distinctive white and green speckled appearance and high hardness (it will scratch glass). Commonly found in India, Brazil, and the USA. Collectors look for high contrast between the white base and vibrant green patterns.
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