mineral

Tumbled yellow quartz

Quartz (SiO₂), likely iron-stained milky quartz or pale citrine

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent cream to honey-yellow, vitreous to waxy luster, massive granular texture, no visible cleavage, conchoidal fracture, specific gravity about 2.65. The rounded shape indicates mechanical tumbling and polishing.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or igneous pegmatites; yellow color commonly comes from iron staining or irradiation-related color centers. The specimen’s exact geological age and locality cannot be determined from the image.

Uses & applications

Used for inexpensive cabochons, tumbled stones, ornaments, and silica products such as glass and electronics. This small common piece has modest collector value.

Geological facts

It may be marketed as lemon quartz, yellow quartz, or low-grade citrine, although true citrine is naturally yellow crystalline quartz. Color alone cannot distinguish citrine from heat-treated or iron-stained quartz.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, rounded conchoidal edges, and ability to scratch ordinary glass; it should not be scratched with a steel knife. Common sources include Brazil, Madagascar, India, and the United States.