SAMPLE OF VARIOUS MINERALS FROM THE BERTA QUARRY OR BERTA MINE IN THE PAPIOL AREA, SANT CUGAT DEL VALLES IN THE PROVINCE OF BARCELONA. SAMPLE OF A MAIN CRYSTAL OF CALCITE WITH TWINS, MIXED WITH FLUORITE CRYSTALS WITH THE TYPICAL GREEN SHADE AND IN THE BACKGROUND GLUED IN THE MATRIX WE CAN SEE GALENA.
Fluorite is a group III mineral (halides) that, according to Strunz's classification, formed the elements calcium and fluorine.
Its structure belongs to the cubic system, and it appears with cubic, octahedral and dodecahedral rhomboid habit.
Fluorite exhibits thermoluminescence and fluorescence physical properties.
In industry, it is mainly used in iron and steel metallurgy. It is used as a source of fluorine and hydrofluoric acid, also in the glazing of ceramics and in the manufacture of optical glasses.
The beauty of the specimens makes it a highly appreciated mineral by museums and private collectors.
