SPECTACULAR WHITE QUARTZ WITH CALCOPIRITE SPOTS OVER GALENA CRYSTALS. FULLY TRANSPARENT AND EXTENDED CRYSTALS IN DIFFERENT DIRECTIONS ON THE MATRIX. PIECE FOUND IN BULGARIA
Quartz is the most common mineral, the most abundant that can be found on earth.
It is composed of silicon and oxygen with SiO₂ formula.
According to the Nickel-Strunz classification, quartz belongs to the class of oxides, while in the Dana classification, it is considered a tectosilicate.
There are multiple varieties of quartz , colors and types.
