mineral

Likely yellow calcite or weathered quartz-bearing rock

Calcite (CaCO₃), possibly with iron-oxide staining; identification uncertain from one image

AI-generated identification · may be incorrect

Small angular, pale yellow-to-cream specimen with a dull to weakly vitreous luster and apparent cleavage or fractured faces. Calcite has Mohs hardness 3, rhombohedral cleavage, and specific gravity about 2.71; quartz would be harder (7) and lack cleavage.

Identified September 20, 2026More mineral →

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At a glance

Common name: Likely yellow calcite or weathered quartz-bearing rock
Scientific name: Calcite (CaCO₃), possibly with iron-oxide staining; identification uncertain from one image
Category: mineral
Identified: September 20, 2026
Method: Standard

AI Estimated Value

About $1-$10 for a small common specimen; higher only if crystals are unusually clear, well formed, or associated with attractive matrix.

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

Most likely formed in a hydrothermal vein or sedimentary cavity, with yellow coloration from iron-oxide impurities. The specimen’s geological age cannot be determined visually.

Uses & applications

Calcite is used in cement, lime, aggregate, and as a collector mineral; attractive transparent pieces may be ornamental. Common pieces generally have little commercial value.

Geological facts

A drop of dilute hydrochloric acid or vinegar may cause visible fizzing if calcite is exposed, though vinegar can be weak. Yellow staining is commonly caused by limonite or other iron oxides.

Field identification & locations

The reported location near 38.1°S, 145.4°E in Victoria makes weathered quartz, calcite, and iron-stained vein material plausible. Confirm with a hardness test: calcite scratches with a copper coin, whereas quartz scratches glass; test acid only on an inconspicuous surface.