mineral

Quartz-rich vein rock, likely milky quartz with iron staining

Quartz (SiO₂), possibly quartz vein material with minor iron oxides and feldspar

AI-generated identification · may be incorrect

White to translucent gray, glassy to waxy luster, irregular fracture, and no obvious cleavage; quartz hardness is Mohs 7 and specific gravity about 2.65. The rusty yellow-brown patches are likely limonite/goethite inclusions or surface staining.

Identified September 8, 2026More mineral →

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At a glance

Common name: Quartz-rich vein rock, likely milky quartz with iron staining
Scientific name: Quartz (SiO₂), possibly quartz vein material with minor iron oxides and feldspar
Category: mineral
Identified: September 8, 2026
Method: Standard

AI Estimated Value

Approximately $1–$10 as a common rough specimen; exceptional clarity, crystal form, or attractive inclusions could raise value to roughly $20–$50.

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 older host rock, later weathered and transported into the streambed. The exact geological age cannot be determined from the photograph.

Uses & applications

Common quartz has low commercial value in this form, though clear, attractive pieces may be used as specimens, lapidary material, or crushed aggregate. It is also important industrially in glass, ceramics, abrasives, and electronics.

Geological facts

Quartz is one of Earth’s most abundant minerals and is chemically resistant, allowing it to survive stream transport. The cavity and rusty staining may indicate weathered inclusions or a former vug.

Field identification & locations

Look for hardness sufficient to scratch ordinary glass, lack of cleavage, and a white translucent body with conchoidal fracture; acid testing is unnecessary. It is commonly found in stream gravels derived from quartz veins and granitic or metamorphic terrain.