mineral

Greenish translucent glassy mineral specimen, possibly fluorite or quartz

Likely fluorite (CaF₂) or green quartz (SiO₂); exact identification requires hardness and cleavage tests

AI-generated identification · may be incorrect

Pale green-gray, translucent, vitreous luster, irregular fracture, and apparent surface pitting; fluorite has Mohs hardness 4 and cubic cleavage, while quartz has hardness 7 and conchoidal fracture. The rounded shape suggests natural wear or tumbling.

Identified September 14, 2026More mineral →

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At a glance

Common name: Greenish translucent glassy mineral specimen, possibly fluorite or quartz
Scientific name: Likely fluorite (CaF₂) or green quartz (SiO₂); exact identification requires hardness and cleavage tests
Category: mineral
Identified: September 14, 2026
Method: Standard

AI Estimated Value

Approximately $2-$15 as an unidentified/common specimen; $20-$100 or more if confirmed as attractive fluorescent fluorite or gem-quality quartz.

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

Could form in hydrothermal veins: fluorite commonly crystallizes in cavities with calcite and quartz, while quartz forms in igneous, metamorphic, and sedimentary environments. Geological age cannot be determined from the photograph.

Uses & applications

Fluorite is used as a flux and fluorine source, with colorful pieces collected or cut as gemstones; quartz is widely used in glass, electronics, abrasives, and jewelry.

Geological facts

Green fluorite can fluoresce under ultraviolet light; quartz generally does not. The specimen’s identity is uncertain because the image lacks visible crystal faces and scale.

Field identification & locations

Test a concealed area: a steel nail scratches fluorite but not quartz; fluorite commonly shows flat cubic cleavage surfaces, whereas quartz does not. Common sources include China, Mexico, the United States, Brazil, and Morocco.