mineral

Weathered quartz-bearing rock, possibly calcite vein fragment

Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)

AI-generated identification · may be incorrect

White to cream, irregular and granular, with a dull to glassy luster; apparent hardness roughly 3–7 depending on the grains, and no clear cleavage visible. The image is insufficient for reliable mineral identification.

Identified September 8, 2026More mineral →

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At a glance

Common name: Weathered quartz-bearing rock, possibly calcite vein fragment
Scientific name: Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)
Category: mineral
Identified: September 8, 2026
Method: Standard

AI Estimated Value

About $1–$10 as an ordinary fragment; attractive crystals or confirmed specimens may sell for $10–$50 or more.

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 in a hydrothermal vein or altered host rock, where silica and carbonate-rich fluids deposited minerals in fractures; age cannot be determined from the photograph.

Uses & applications

Common specimens have little industrial or jewelry value, though quartz-rich material may be collected or used educationally; calcite and quartz are important industrial minerals.

Geological facts

The orange coloration may be iron-oxide staining or surface alteration. A steel nail can test hardness, while dilute hydrochloric acid or vinegar may fizz if exposed calcite is present.

Field identification & locations

Possible quartz/calcite fragments occur worldwide in veins and altered igneous, sedimentary, and metamorphic rocks. A fresh break, streak test, hardness test, and acid test would improve identification.