SPECTACULAR PIECE OF CUARZOS DE LA CABRERA IN MADRID. VERY GOOD PIECE WITH CRYSTALS SPREAD IN ALL DIRECTIONS ON THE MATRIX TOTALLY TRANSPARENT. VERY GOOD PIECE THAT CANNOT BE MISSING IN YOUR COLLECTION.
Quartz is the most common mineral, the most abundant that can be found on earth.
It is composed of silicon and oxygen with the formula SiO₂.
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.
