mineral

Banded Agate (Carnelian variety)

Cryptocrystalline Quartz (SiO2)

Hardness: 6.5-7 on Mohs scale. Color: Translucent red, orange, and white bands. Luster: Vitreous to waxy. Crystal structure: Trigonal/Microcrystalline. Cleavage: None (conchoidal fracture). Specific Gravity: 2.58-2.64.

Hardness: 6
Color: Translucent red, orange, and white bands
Luster: Vitreous to waxy

Identified May 19, 2026More mineral →

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Physical properties

Formation & geological history

Formed within cavities in volcanic rocks (lavas) or metamorphic rocks by the deposition of silica from groundwater. The red coloration is due to iron oxide (hematite) impurities.

Uses & applications

Commonly used in jewelry (cabochons, beads), decorative carvings, and as a healing stone in holistic practices. Historically used for making signet rings and seals.

Geological facts

Agate was named by Theophrastus, a Greek philosopher, who discovered the stone along the shore of the Achates River in Sicily. Carnelian was widely used in Ancient Egypt for amulets.

Field identification & locations

Identified by its waxy luster, hardness (it can scratch glass), and distinct translucent color banding. Often found in riverbeds or on beaches near volcanic areas.

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