mineral

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (silicon dioxide, SiO₂); exact specimen identification is uncertain from the image

AI-generated identification · may be incorrect

White to translucent, vitreous-to-dull luster, irregular granular texture, and no obvious cleavage; quartz hardness is Mohs 7 and specific gravity about 2.65. The porous, crumbly appearance may indicate quartz-rich weathered rock rather than a clean crystal.

Identified September 8, 2026More mineral →

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At a glance

Common name: Quartz-rich rock, possibly milky quartz or quartzite
Scientific name: Quartz (silicon dioxide, SiO₂); exact specimen identification is uncertain from the image
Category: mineral
Identified: September 8, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 for ordinary loose pieces; attractive crystals or well-formed specimens may range from $10–$100+.

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 in igneous, metamorphic, and hydrothermal environments; quartzite forms when sandstone is metamorphosed. Its age cannot be determined visually and may range from ancient to geologically recent.

Uses & applications

Used in glass, ceramics, electronics, abrasives, construction aggregate, and countertops; attractive pieces may be collected but are usually low-value.

Geological facts

Quartz is one of Earth’s most abundant minerals and has strong conchoidal fracture rather than cleavage.

Field identification & locations

Common worldwide, especially in veins, pegmatites, sandstones, and quartzite outcrops. Test with a steel knife or glass: genuine quartz should scratch glass and resist a knife; a definitive identification may require hardness, acid, and microscopic tests.