mineral

Polished smoky quartz crystal with inclusions

Quartz, silicon dioxide (SiO₂), likely smoky quartz with iron-oxide or other mineral inclusions

AI-generated identification · may be incorrect

Mohs hardness 7; translucent gray-brown to nearly clear, with vitreous luster and conchoidal fracture. Hexagonal quartz structure; the apparent flat base and pointed top indicate it was cut or shaped rather than naturally terminated.

Identified September 12, 2026More mineral →

Explore Polished smoky quartz crystal with inclusions in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Polished smoky quartz crystal with inclusions
Scientific name: Quartz, silicon dioxide (SiO₂), likely smoky quartz with iron-oxide or other mineral inclusions
Category: mineral
Identified: September 12, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a small polished included quartz piece; $30–$100+ if the inclusions, clarity, or provenance are exceptional.

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 in cavities of igneous and metamorphic rocks, commonly during the Paleozoic–Cenozoic; exact age cannot be determined from the image.

Uses & applications

Used as a collector specimen, ornamental stone, and occasionally in jewelry; included quartz is generally more decorative than gem-grade.

Geological facts

The dark smoky color commonly results from radiation-induced color centers associated with aluminum impurities; heating can partially remove the color.

Field identification & locations

Identify by its glassy luster, hardness, lack of obvious cleavage, and hexagonal crystal habit; common sources include Brazil, Madagascar, Switzerland, and the United States. The inclusions may also indicate tourmaline, mica, or iron oxides, but visual confirmation is insufficient.