mineral

Milky quartz with dark mineral veins

Quartz, silicon dioxide (SiO₂), likely massive vein quartz; dark veins may be chlorite, mica, iron/manganese oxides, or a sulfide mineral

AI-generated identification · may be incorrect

Typically white to cream, translucent to opaque, with a vitreous-to-waxy luster and irregular fracture; Mohs hardness 7, no cleavage, hexagonal crystal structure, and specific gravity about 2.65. The specimen appears massive and weathered rather than distinctly crystalline.

Identified August 14, 2026More mineral →

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At a glance

Common name: Milky quartz with dark mineral veins
Scientific name: Quartz, silicon dioxide (SiO₂), likely massive vein quartz; dark veins may be chlorite, mica, iron/manganese oxides, or a sulfide mineral
Category: mineral
Identified: August 14, 2026
Method: Standard

AI Estimated Value

About $5–$25 for a common hand specimen; roughly $30–$100 if unusually large, attractive, or locality-documented.

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

Likely formed when silica-rich hydrothermal fluids filled fractures in surrounding rock, later exposed by uplift and weathering; precise age and locality cannot be determined from the image. Associated dark material may represent altered host rock or secondary minerals.

Uses & applications

Quartz is used in glass, ceramics, electronics, abrasives, and engineered stone; attractive pieces are sold as cabinet specimens or lapidary material. The irregular, fractured appearance limits gemstone value.

Geological facts

Milky color results from microscopic fluid inclusions, fractures, or defects scattering light. Dark vein material should be tested separately because it may significantly change the identification.

Field identification & locations

Identify with a steel file or glass-scratch test: quartz should scratch glass and resist a steel knife; it should not fizz in dilute acid. Common in hydrothermal veins, pegmatites, and quartz-rich metamorphic rocks worldwide.