mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

Hardness: 6.5-7 on Mohs scale; Color: Multi-colored bands (brown, white, tan); Luster: Waxy to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.64.

Hardness: 6
Color: Multi-colored bands (brown, white, tan)
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, tan); Luster: Waxy to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.64.

Formation & geological history

Formed in cavities within volcanic or sedimentary rocks where silica-rich groundwater deposits layers of quartz and chalcedony over time. Often found in ancient lava flows.

Uses & applications

Commonly used in lapidary work, jewelry making (cabochons), interior decor, and as healing stones in metaphysical practices.

Geological facts

The distinct banding in agates is caused by variations in the minerals present during different periods of deposition. It is the state gemstone of several US states including Minnesota.

Field identification & locations

Identified by its translucent properties when held to light and its characteristic parallel banding layers. Often found in riverbeds or near ancient volcanic sites globally.