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 incorrectPale 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 More mineral →
Explore Greenish translucent glassy mineral specimen, possibly fluorite or quartz in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
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.
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.
