mineral

Brown Agate

Cryptocrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Translucent to opaque chocolate brown with white veining; Luster: Waxy to vitreous; Crystal Structure: Trigonal/Hexagonal; Specific Gravity: 2.58-2.64

Hardness: 6
Color: Translucent to opaque chocolate brown with white veining
Luster: Waxy to vitreous

Identified July 21, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Translucent to opaque chocolate brown with white veining; Luster: Waxy to vitreous; Crystal Structure: Trigonal/Hexagonal; Specific Gravity: 2.58-2.64

Formation & geological history

Formed in cavities of volcanic rock or ancient lavas, where silica-rich groundwater deposits layers over time. This specimen is a tumbled and polished piece.

Uses & applications

Ornamental use, jewelry making, lapidary art, and collection as a healing stone or decorative specimen.

Geological facts

Agate is named after the Achates River in Sicily where it was first discovered. It is one of the most common materials used throughout history for hardstone carving.

Field identification & locations

Identify by its characteristic banding or translucency when held to light. Can be found globally in volcanic regions like Brazil, India, and the United States.