mineral

Carnelian Agate (Tumbled)

Chalcedony (SiO2)

AI-generated identification · may be incorrect

Hardness of 6.5-7 on the Mohs scale. Orange, brownish-red to red color due to iron oxide impurities. Vitreous to waxy luster. Cryptocrystalline structure. No cleavage. Specific gravity 2.59-2.61.

Identified August 25, 2026More mineral →

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Physical properties

Hardness of 6.5-7 on the Mohs scale. Orange, brownish-red to red color due to iron oxide impurities. Vitreous to waxy luster. Cryptocrystalline structure. No cleavage. Specific gravity 2.59-2.61.

Formation & geological history

Forms from the deposition of silica in cavities of igneous and sedimentary rocks. Color is derived from iron impurities.

Uses & applications

Commonly used in jewelry, lapidary arts, and crystal healing.

Geological facts

Carnelian was widely used during Roman times to make engraved gems for signet or seal rings.

Field identification & locations

Identified by its distinctive orange-red hue and waxy luster. Commonly found in Brazil, India, Siberia, and Germany. Collectors look for even coloration and translucency.