mineral

Tumbled yellow quartz, possibly citrine

Quartz (SiO₂), likely iron-colored citrine or pale golden chalcedony

AI-generated identification · may be incorrect

Translucent yellow, vitreous-to-waxy luster, irregular tumbled shape, and no obvious cleavage; quartz hardness is Mohs 7, with specific gravity about 2.65. Internal fractures and color zoning are visible, but the image cannot confirm crystal structure or treatment.

Identified September 12, 2026More mineral →

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Physical properties

Formation & geological history

Quartz forms in hydrothermal veins and igneous cavities; yellow citrine derives mainly from iron impurities, while similar material may be heat-treated amethyst or dyed chalcedony. The specimen’s geological age is indeterminate and depends on its host deposit.

Uses & applications

Used as a lapidary stone, jewelry, ornamental material, and mineral specimen. Natural bright citrine is collectible, though much commercial citrine is heat-treated amethyst.

Geological facts

Its rounded surface indicates tumbling or polishing rather than a natural crystal face. Strong yellow color with cloudy translucency may also indicate yellow chalcedony or treated quartz.

Field identification & locations

Look for glassy luster, conchoidal fracture, absence of cleavage, and resistance to scratching by ordinary steel; quartz should not be scratched by a knife. Common sources include Brazil, Madagascar, Uruguay, and Zambia.