mineral

Quartz crystal cluster (likely smoky quartz)

Quartz, SiO₂; the brown-gray coloration may indicate smoky quartz, but the photo alone cannot confirm it.

AI-generated identification · may be incorrect

Translucent to opaque, gray-brown, with a vitreous sheen and irregular, apparently broken surfaces; Mohs hardness 7, hexagonal crystal system, no cleavage, and conchoidal fracture. The image does not clearly show diagnostic crystal terminations.

Identified October 9, 2026More mineral →

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At a glance

Common name: Quartz crystal cluster (likely smoky quartz)
Scientific name: Quartz, SiO₂; the brown-gray coloration may indicate smoky quartz, but the photo alone cannot confirm it.
Category: mineral
Identified: October 9, 2026
Method: Standard

AI Estimated Value

Approximately $5–$50 for a common rough specimen; more if the crystal faces, size, 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 forms when silica-rich fluids crystallize in fractures, veins, or cavities, commonly during hydrothermal activity. Its age and exact formation setting cannot be determined from the image.

Uses & applications

Quartz is used in glass, electronics, and abrasives; attractive crystals are collected and sometimes used in jewelry or display specimens.

Geological facts

Smoky quartz’s color is generally caused by irradiation-related defects in the crystal, often involving trace aluminum; ordinary quartz is commonly colorless or white.

Field identification & locations

Look for hardness sufficient to scratch glass, lack of cleavage, and six-sided prisms with pointed ends; a scratch test on the specimen is best avoided if it is collectible. Quartz is widespread, including in Iran, but the reported regional location cannot establish the specimen’s identity or provenance.