mineral

Dendritic Agate

Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide

Hardness: 6.5–7 on Mohs scale; Color: Translucent to opaque white/yellow/gray with dark tree-like inclusions; Luster: Vitreous to waxy; Structure: Microcrystalline (trigonal system); Specific Gravity: 2.58–2.64.

Hardness: 6
Luster: Vitreous to waxy

Identified March 25, 2026More mineral →

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Physical properties

Formation & geological history

Forms when manganese and iron-rich mineral waters flow through cracks and cavities in volcanic or sedimentary host rocks, depositing crystal patterns as the agate solidifies over millions of years.

Uses & applications

Primarily used in jewelry (cabochons), ornamental carvings, and as a popular collector's gemstone due to its unique patterns.

Geological facts

Known as the 'Stone of Plentitude,' it was historically associated with dryads and woodland spirits. The 'dendritic' name comes from the Greek word 'dendron,' meaning tree.

Field identification & locations

Identify in the field by its waxy texture, translucency when held to light, and characteristic branching 'moss' or 'fern' patterns that stay visible inside the stone. Found frequently in India, Brazil, and the USA.

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