mineral
Orange chalcedony / carnelian with drusy quartz
Microcrystalline quartz, SiO₂ (chalcedony; iron-colored variety often called carnelian), with possible calcite or quartz matrix
AI-generated identification · may be incorrectTranslucent orange to honey-colored material with waxy-to-glassy luster and irregular fracture; apparent hardness about 6.5–7 Mohs if quartz. The silvery sparkly matrix may be druzy quartz or altered host rock. Crystal structure is trigonal quartz, though chalcedony is fibrous microcrystalline.
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Physical properties
Translucent orange to honey-colored material with waxy-to-glassy luster and irregular fracture; apparent hardness about 6.5–7 Mohs if quartz. The silvery sparkly matrix may be druzy quartz or altered host rock. Crystal structure is trigonal quartz, though chalcedony is fibrous microcrystalline.
Formation & geological history
Likely silica-rich vein or cavity fill, colored orange by iron oxides; later weathering may expose the specimen. Chalcedony commonly forms in volcanic cavities and hydrothermal veins, generally from relatively young to ancient geologic settings.
Uses & applications
Used for cabochons, beads, carvings, and decorative specimens; translucent, clean carnelian can be jewelry-grade. This rough piece is mainly a collector specimen.
Geological facts
The orange color can be enhanced by heating, and agate/chalcedony varieties are often confused with glass or resin. A white streak, conchoidal fracture, and lack of obvious bubbles support quartz rather than glass.
Field identification & locations
The photograph supports orange chalcedony/carnelian, but exact identification needs testing: quartz should scratch glass and resist a steel blade; calcite matrix would fizz weakly in dilute hydrochloric acid. Near 48.1°N, 122.2°W, glacially transported quartz-rich material is plausible, though the exact source cannot be determined visually.
