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 the Strunz classification, forms the elements calcium and fluorine.
Its structure belongs to the cubic system, and is presented with cubic, octahedral and rhombic dodecahedral habits.
Fluorite exhibits physical properties of thermoluminescence and fluorescence.
In industry, it is mainly used in iron and steel metallurgy. It is used as a source of fluorine and hydrofluoric acid, and also in the enamelling of ceramics and in the manufacture of optical glass.
The beauty of the specimens makes it a highly appreciated mineral by museums and private collectors.
