gemstone

Likely yellow chalcedony or citrine cabochon

Cryptocrystalline quartz (chalcedony), SiO₂; alternatively quartz variety citrine

AI-generated identification · may be incorrect

Small polished, translucent yellow-orange, waxy to vitreous luster, and rounded cabochon shape. Quartz hardness is Mohs 7, with no visible cleavage and specific gravity near 2.60–2.65; the image alone cannot distinguish chalcedony from citrine or dyed material.

Identified August 10, 2026More gemstone →

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Physical properties

Formation & geological history

Chalcedony forms when silica-rich groundwater fills cavities and fractures, commonly in volcanic rocks; citrine forms from iron-bearing quartz in hydrothermal or pegmatitic settings. Quartz is mainly Phanerozoic to Precambrian in age depending on its host deposit.

Uses & applications

Used as inexpensive jewelry, beads, carvings, and collector specimens. Quality and natural color determine value.

Geological facts

The specimen is too small and image-limited for definitive identification; yellow chalcedony may also be marketed as yellow agate or lemon quartz.

Field identification & locations

Check translucency, uniformity, and hardness; quartz should scratch ordinary glass, though this test risks damage. Look for dye concentration in cracks or pores, and use magnification or refractive-index testing for confirmation.