Rock Identifier
Tumbled honey-colored chalcedony (likely carnelian or orange agate) (Microcrystalline quartz, SiO₂ (chalcedony); exact variety cannot be confirmed from the image) — gemstone
gemstone

Tumbled honey-colored chalcedony (likely carnelian or orange agate)

Microcrystalline quartz, SiO₂ (chalcedony); exact variety cannot be confirmed from the image

AI-generated identification · may be incorrect

Opaque to slightly translucent, warm tan-orange, with a smooth rounded surface and dull-to-waxy luster. Hardness about 6.5–7 Mohs; trigonal quartz in microscopic crystals, with no obvious cleavage and conchoidal fracture.

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Physical properties

Opaque to slightly translucent, warm tan-orange, with a smooth rounded surface and dull-to-waxy luster. Hardness about 6.5–7 Mohs; trigonal quartz in microscopic crystals, with no obvious cleavage and conchoidal fracture.

Formation & geological history

Silica-rich groundwater deposits chalcedony in cavities and fractures, often in volcanic rocks; agate bands may form through repeated deposition. Such deposits occur across many geologic ages.

Uses & applications

Polished pieces are used in jewelry, beads, and collecting; chalcedony has also been used for carvings and ornamental objects.

Geological facts

Carnelian is typically red-orange chalcedony, while agate is commonly banded; this specimen’s smooth, uniformly colored appearance does not show diagnostic banding.

Field identification & locations

Common sources include Brazil, India, Madagascar, and the western United States. Field clues include hardness, waxy luster, and conchoidal fracture; the pictured piece appears tumbled, so visual identification is uncertain.