SAMPLE OF ROCK CRYSTAL QUARTZ MIXED WITH HUBNERITE CRYSTALS FROM PERU. TOTALLY TRANSPARENT CRYSTALS OF VERY GOOD QUALITY. VERY GOOD PIECE OF THIS MIX OF MINERALS
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.
