mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Multi-colored bands (brown, white, grey); Luster: Waxy to vitreous; Structure: Microcrystalline; Cleavage: None (Conchoidal fracture).

Hardness: 6
Color: Multi-colored bands (brown, white, grey)
Luster: Waxy to vitreous

Identified June 30, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Multi-colored bands (brown, white, grey); Luster: Waxy to vitreous; Structure: Microcrystalline; Cleavage: None (Conchoidal fracture).

Formation & geological history

Forms through the deposition of silica from groundwater into cavities (gas bubbles) in volcanic rocks over millions of years, often in layers.

Uses & applications

Used extensively in jewelry making, ornamental carvings, lapidary arts, and for metaphysical collecting.

Geological facts

The unique banding is caused by rhythmic crystallization of silica. Historically used as amulets for protection, particularly by ancient Greeks.

Field identification & locations

Identified by distinct concentric or parallel banding and translucency when held to light. Common in gravel pits, riverbeds, and volcanic regions.

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