mineral

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions

Hardness: 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

Identified June 3, 2026More mineral →

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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.

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