SMOKED QUARTZ GLASS POINT EXTRACTED IN RIUDARENAS (GIRONA). PERFECT COLOR AND SHAPE OF THE CRYSTALIZATION. UNIQUE BUT TWIN CRYSTALIZATION IN THE SAME PRISM. PIECE FOR NEW COLLECTORS
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.
