mineral

Tumbled yellow quartz (likely citrine or iron-stained quartz)

Quartz, SiO₂; yellow color from trace iron or irradiation/heat-related coloration

AI-generated identification · may be incorrect

Translucent honey-yellow, vitreous luster, irregularly tumbled form, no obvious cleavage, Mohs hardness 7, specific gravity about 2.65; dark internal material may be iron-oxide or a mineral inclusion. The image is insufficient to confirm citrine versus other yellow quartz or resin-treated material.

Identified August 11, 2026More mineral →

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At a glance

Common name: Tumbled yellow quartz (likely citrine or iron-stained quartz)
Scientific name: Quartz, SiO₂; yellow color from trace iron or irradiation/heat-related coloration
Category: mineral
Identified: August 11, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a small common tumbled piece; $20–$100+ if confirmed natural citrine with attractive clarity and inclusions.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or igneous rocks; yellow varieties commonly form through iron impurities and later alteration. Geological age depends on its host deposit, ranging from Precambrian to modern hydrothermal systems.

Uses & applications

Used as a decorative and lapidary stone, beads, carvings, and inexpensive jewelry; ordinary pieces have limited industrial value compared with clear quartz.

Geological facts

Natural citrine is relatively uncommon; much commercial “citrine” is heat-treated amethyst. A glass-scratch test can help, but may damage the specimen.

Field identification & locations

Common sources include Brazil, Madagascar, Uruguay, Spain, and the United States. Look for quartz-like translucency, glassy luster, and hardness; bubbles or unusually uniform color may indicate glass or resin.