mineral
Carnelian Agate (Tumbled)
Chalcedony (SiO2)
AI-generated identification · may be incorrectHardness 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.
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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.
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