SPECTACULAR AMETHYST DRUSE WITH LARGE SIZE CRYSTALS. PIECE EXTRACTED IN BRAZIL. PIECE FOR COLLECTION OR TABLE.
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.
