gemstone

Smoky quartz and clear/white quartz bead necklace

Quartz, silicon dioxide (SiO₂); smoky variety colored by irradiation-related defects

AI-generated identification · may be incorrect

Beads show translucent gray-brown smoky quartz alternating with colorless to milky quartz. Quartz has Mohs hardness 7, vitreous luster, trigonal crystal structure, no cleavage, and specific gravity about 2.65; surfaces are polished and drilled.

Identified September 18, 2026More gemstone →

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At a glance

Common name: Smoky quartz and clear/white quartz bead necklace
Scientific name: Quartz, silicon dioxide (SiO₂); smoky variety colored by irradiation-related defects
Category: gemstone
Identified: September 18, 2026
Method: Standard

AI Estimated Value

Approximately $10–$40 for a common bead necklace; more if beads are unusually clear, large, or verified natural smoky quartz.

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 and igneous pegmatites; smoky coloration develops through natural irradiation of aluminum-related defects. Quartz ranges from Precambrian to modern geological ages and occurs worldwide.

Uses & applications

Used for inexpensive jewelry, ornament, and collecting. This is a human-processed geological specimen, not a single natural rock.

Geological facts

Smoky quartz is typically brown, gray, or nearly black; heating can remove its color, while irradiation can sometimes create it. The pale beads may also include milky quartz or another pale quartz variety.

Field identification & locations

Identify quartz by its glassy luster, lack of cleavage, hardness, and inability to scratch it with a steel nail easily; smoky quartz is distinguished by its smoky translucent color. Common sources include Brazil, Madagascar, Switzerland, and the United States.