mineral
Likely pale green-yellow fluorite
Fluorite (calcium fluoride, CaF₂)
AI-generated identification · may be incorrectSmall, rough, translucent pale green-yellow piece with a vitreous to slightly dull luster; fluorite has Mohs hardness 4 and perfect octahedral cleavage. The image does not show enough detail for a reliable identification.
Identified More mineral →
Explore Likely pale green-yellow fluorite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Small, rough, translucent pale green-yellow piece with a vitreous to slightly dull luster; fluorite has Mohs hardness 4 and perfect octahedral cleavage. The image does not show enough detail for a reliable identification.
Formation & geological history
Fluorite commonly crystallizes from hydrothermal fluids in veins and cavities, often with calcite, quartz, or sulfide minerals. Deposits occur in rocks of many geological ages.
Uses & applications
Used as a flux in steelmaking and as a source of fluorine; transparent, colorful crystals are collected and occasionally cut for jewelry, though fluorite is relatively soft.
Geological facts
Fluorite fluoresces under ultraviolet light in some specimens; its name gave the phenomenon “fluorescence” its name.
Field identification & locations
Check for softness and cleavage: fluorite can be scratched with a steel knife and breaks along smooth planes. Common localities include China, Mexico, England, and Illinois, USA; a photo alone cannot confirm the mineral.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary