SPECTACULAR QUARTZ WITH SAMPLES OF SMALL EPIDOTS ON ITS MATRIX TOTALLY TRANSPARENT WHITE QUARTZS WITH A VERY GOOD QUALITY ON THE MATRIX FROM LA CABRERA IN MADRID.
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.
