mineral

Likely fluorescent calcite-bearing rock

Calcite (CaCO₃), possibly with fluorescent activator impurities; exact identification is uncertain from the image

AI-generated identification · may be incorrect

Rough, pale gray-lavender specimen glowing violet under UV light. Calcite has Mohs hardness 3, vitreous to pearly luster, trigonal crystal structure, and perfect rhombohedral cleavage; the UV response may come from trace manganese or other impurities.

Identified October 15, 2026More mineral →

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At a glance

Common name: Likely fluorescent calcite-bearing rock
Scientific name: Calcite (CaCO₃), possibly with fluorescent activator impurities; exact identification is uncertain from the image
Category: mineral
Identified: October 15, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small, common fluorescent specimen; more if confirmed, unusually bright, or aesthetically distinctive.

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

Calcite commonly forms by precipitation from groundwater or hydrothermal fluids and in sedimentary carbonate rocks; its age and specific formation environment cannot be determined from the image.

Uses & applications

Calcite is used in cement, lime, and as a mineral specimen; fluorescent pieces are mainly collected or displayed under UV light.

Geological facts

Fluorescence varies with trace elements and can appear in different colors under ultraviolet illumination.

Field identification & locations

Look for calcite’s rhombohedral cleavage and test hardness cautiously; dilute acid causes brisk fizzing on fresh surfaces. The visible violet glow alone is not diagnostic, so confirmation may require hardness, cleavage, or acid testing.