AMETHYST QUARTZ ON MATRIX, EXTRACTED IN LA UNION (MURCIA), FROM THE LOS PAJARITOS MINE. FIRST QUALITY AMETHYST QUARTZ CRYSTALS OF WHICH WE CAN SEE THE BASE WITH ITS MILKY TONE AND THE AMETHYST TIP
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.
