mineral

Quartz-rich breccia or vein quartz specimen

Microcrystalline and crystalline quartz (SiO₂), possibly with iron-oxide staining and minor sulfides

AI-generated identification · may be incorrect

Hardness about 7 Mohs; white, gray, translucent, and brown-gold areas with vitreous to waxy luster. Irregular fractured/brecciated texture, no obvious cleavage, and specific gravity near 2.65; the metallic dark patches may be iron oxides or sulfides.

Identified August 21, 2026More mineral →

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At a glance

Common name: Quartz-rich breccia or vein quartz specimen
Scientific name: Microcrystalline and crystalline quartz (SiO₂), possibly with iron-oxide staining and minor sulfides
Category: mineral
Identified: August 21, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common hand specimen; roughly $30–$150 if unusually attractive, locality-labeled, or confirmed mineralized.

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 and cemented fractures, with later oxidation producing brown and black staining. Exact geological age and locality cannot be determined from the photograph.

Uses & applications

Common quartz-rich material is used for aggregate, silica, glass, and decorative stone; attractive pieces are sold as cabinet specimens. Value is usually modest unless the metallic inclusions or locality are distinctive.

Geological facts

The angular internal fragments and vein-like pale quartz are characteristic of brecciation followed by mineral deposition. A streak test, hardness test, and close inspection for metallic sulfides would improve identification.

Field identification & locations

Look for glassy fracture surfaces, inability to scratch quartz with a steel knife, and possible iron-rich yellow-brown coatings; vinegar will not fizz. Common in hydrothermal veins and mineralized fault zones worldwide.