mineral

Tumbled yellow chalcedony (likely honey quartz or pale citrine)

Microcrystalline quartz, SiO₂; exact identity cannot be confirmed visually

AI-generated identification · may be incorrect

Translucent pale yellow, waxy-to-glassy luster, rounded tumbled form, no visible cleavage; Mohs hardness 7 and specific gravity about 2.60–2.65. Chalcedony is cryptocrystalline quartz, while citrine is crystalline quartz.

Identified August 22, 2026More mineral →

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Physical properties

Formation & geological history

Quartz-bearing fluids deposited silica in cavities, veins, or volcanic rocks; yellow coloration may result from iron or heat treatment. Deposits range from ancient Precambrian to much younger volcanic settings.

Uses & applications

Used as an ornamental stone, cabochon, bead, carving material, and inexpensive gemstone; tumbled pieces are mainly decorative or collectible.

Geological facts

Chalcedony can resemble yellow jasper, calcite, or dyed quartz. A steel blade should not scratch quartz, but hardness testing should be done inconspicuously.

Field identification & locations

Commonly found in volcanic cavities, hydrothermal veins, and silica-rich gravels worldwide, especially Brazil, Uruguay, Madagascar, India, and the United States. Quartz-like hardness and translucent waxy appearance help distinguish it from calcite.