mineral

Honey-colored chalcedony (likely rough agate/jasper)

Microcrystalline quartz, SiO₂; possibly iron-stained chalcedony

AI-generated identification · may be incorrect

Translucent yellow-brown, waxy to vitreous luster, cryptocrystalline structure, no obvious cleavage, conchoidal fracture; Mohs hardness about 6.5–7 and specific gravity near 2.60. The irregular cloudy banding and translucency are consistent with chalcedony rather than glass.

Identified August 25, 2026More mineral →

Explore Honey-colored chalcedony (likely rough agate/jasper) in the encyclopedia →

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Physical properties

Formation & geological history

Forms when silica-rich groundwater fills cavities, fractures, or vesicles in volcanic rock, later depositing microscopic quartz fibers; yellow-brown colors commonly result from iron oxides. The specimen’s precise geological age and locality cannot be determined from the image.

Uses & applications

Used for beads, cabochons, carvings, lapidary pieces, and collector specimens; less commonly used as an aggregate or ornamental stone.

Geological facts

Chalcedony is quartz too fine-grained to show individual crystals, and agate is its banded variety. Heating or dyeing can intensify yellow, orange, or brown colors.

Field identification & locations

Test cautiously on an inconspicuous edge: it should scratch glass but not be scratched by a steel knife; it feels notably heavier than plastic and lacks bubbles typical of glass. Common sources include Brazil, Uruguay, Mexico, India, Madagascar, and the western United States.