mineral

Blue-green fluorite (likely rough fragment)

Fluorite, CaF₂

AI-generated identification · may be incorrect

Pale blue-green with whitish cloudy areas and a vitreous-to-waxy surface; fluorite is cubic, commonly cleaves into octahedral pieces, and has Mohs hardness 4 (specific gravity about 3.2).

Identified October 3, 2026More mineral →

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Physical properties

Pale blue-green with whitish cloudy areas and a vitreous-to-waxy surface; fluorite is cubic, commonly cleaves into octahedral pieces, and has Mohs hardness 4 (specific gravity about 3.2).

Formation & geological history

Forms when calcium- and fluoride-rich hydrothermal fluids fill fractures and cavities, often alongside quartz or calcite. Fluorite deposits occur across many geological ages.

Uses & applications

Used as a source of fluorine in chemical and metallurgical industries; clear, colorful material is cut for jewelry and collected as mineral specimens.

Geological facts

Fluorite fluoresces under ultraviolet light in some specimens, a phenomenon named after the mineral.

Field identification & locations

The blue-green color and pale mottling fit fluorite, but a photo cannot confirm identification; check for hardness 4 and distinctive cleavage. Common localities include China, Mexico, South Africa, and the United States.