metamorphic

Likely quartz-rich rock (milky quartz or quartzite)

Quartz-rich metamorphic rock, likely quartzite; predominantly silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Pale gray-white, rough and massive with a glassy-to-dull sparkle. Quartz is Mohs 7, hexagonal in crystal structure, and lacks cleavage; the image alone cannot confirm whether this is quartzite or a quartz mass.

Identified October 14, 2026More metamorphic →

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At a glance

Common name: Likely quartz-rich rock (milky quartz or quartzite)
Scientific name: Quartz-rich metamorphic rock, likely quartzite; predominantly silicon dioxide (SiO₂)
Category: metamorphic
Identified: October 14, 2026
Method: Standard

AI Estimated Value

Approximately $1–$10 for an ordinary rough specimen; higher values generally require distinctive crystals, color, or 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

Quartzite forms when sandstone is recrystallized by heat and pressure; massive quartz can also precipitate from silica-rich fluids. No age or formation setting can be determined from the photo.

Uses & applications

Quartzite is used as building and road stone, while attractive quartz specimens are collected and sometimes used decoratively.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly occurs in many rock types.

Field identification & locations

Look for a hard, quartz-rich texture that scratches glass and does not show obvious cleavage; a fresh broken surface can help distinguish interlocking quartzite grains from massive quartz. Both occur worldwide.