metamorphic

Milky quartz-rich rock (likely quartzite)

Quartzite, composed predominantly of quartz (SiO₂); identification is tentative from the image

AI-generated identification · may be incorrect

Pale cream to white, coarse and sugary/glassy-looking texture with a vitreous luster; quartz hardness 7 Mohs and trigonal crystal structure. No obvious cleavage; quartzite typically breaks across interlocking grains.

Identified October 14, 2026More metamorphic →

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At a glance

Common name: Milky quartz-rich rock (likely quartzite)
Scientific name: Quartzite, composed predominantly of quartz (SiO₂); identification is tentative from the image
Category: metamorphic
Identified: October 14, 2026
Method: Standard

AI Estimated Value

Approximately $1–$15 for a common hand-sized, unpolished specimen; higher prices require verified locality or notable quality.

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

If quartzite, it formed when quartz-rich sandstone recrystallized under heat and pressure, at an age dependent on its source rocks and metamorphic history. The image alone cannot establish its age or distinguish it confidently from massive milky quartz.

Uses & applications

Quartzite is used as aggregate, paving and dimension stone; attractive pieces may be polished or collected. Massive quartz is also used in glass and silicon production.

Geological facts

Quartzite is highly resistant to weathering and usually scratches glass. A close inspection for sand-grain remnants or interlocking quartz grains can help distinguish it from a single quartz vein specimen.

Field identification & locations

Look for a hard, quartz-rich surface and lack of cleavage; quartzite commonly occurs in metamorphic belts, while milky quartz occurs widely in veins. The specimen’s exact identity and locality are not determinable from the photo.