mineral
Dendritic Agate
Silicon Dioxide (SiO2) with inclusions
AI-generated identification · may be incorrectHardness: 6.5-7 Mohs; Color: translucent yellowish-brown with dark inclusions; Luster: waxy to vitreous; Structure: Microcrystalline (trigonal); Cleavage: none.
- Hardness
- 6
- Color
- translucent yellowish-brown with dark inclusions
- Luster
- waxy to vitreous
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Physical properties
Hardness: 6.5-7 Mohs; Color: translucent yellowish-brown with dark inclusions; Luster: waxy to vitreous; Structure: Microcrystalline (trigonal); Cleavage: none.
Formation & geological history
Formed via the deposition of silica from groundwater in cavities of igneous rocks; dark tree-like patterns are manganese or iron oxide inclusions.
Uses & applications
Commonly used in jewelry (cabochons), lapidary art, and as a collector's specimen due to its unique patterns.
Geological facts
Often called the 'Stone of Plenitude.' Though called dendritic agate, it is technically a chalcedony because it lacks the concentric banding of true agate.
Field identification & locations
Identify by the characteristic branching 'dendrite' inclusions that resemble plants or moss. Commonly found in Brazil, India, and the USA.
