gemstone

Citrine quartz gemstones

Quartz, silicon dioxide (SiO₂), likely heat-treated amethyst or smoky quartz

AI-generated identification · may be incorrect

Mohs hardness 7; transparent yellow to honey-brown color, vitreous luster, and trigonal crystal structure. Quartz has indistinct cleavage, conchoidal fracture, and specific gravity about 2.65; the stones appear faceted and polished.

Identified September 12, 2026More gemstone →

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At a glance

Common name: Citrine quartz gemstones
Scientific name: Quartz, silicon dioxide (SiO₂), likely heat-treated amethyst or smoky quartz
Category: gemstone
Identified: September 12, 2026
Method: Standard

AI Estimated Value

Approximately $10-$75 per stone for common commercial material; fine untreated citrine may bring $100-$500+ depending on size, color, clarity, and provenance.

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

Natural citrine forms when iron-bearing quartz crystallizes in hydrothermal veins or pegmatites; much commercial citrine is heat-treated amethyst. Quartz commonly formed from the Precambrian onward in granitic and volcanic environments.

Uses & applications

Used primarily as jewelry and ornamental gemstones; quartz is also important in glass, electronics, abrasives, and engineered stone. These appear cut for rings, pendants, or decorative use.

Geological facts

Natural citrine is relatively uncommon, while heat-treated amethyst is widespread and often more orange-brown. Color zoning, reddish heat marks, or an amethyst-like purple remnant can indicate treatment.

Field identification & locations

Check for quartz’s hardness, glassy luster, and conchoidal fracture; it should scratch ordinary glass but not be scratched by a steel knife. Common sources include Brazil, Madagascar, Zambia, Uruguay, and Russia; faceting and apparent clarity make exact locality difficult to determine.