DOUBLY TERMINATED AMETHYST QUARTZ ON MATRIX, EXTRACTED IN LA UNION (MURCIA), FROM THE LOS PAJARITOS MINE. WE CAN SEE SMALL CRYSTALS ON THE SIDES OF THE MAIN GLASS PIECE FOR 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 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.
