GREAT SAMPLE OF AMETHYST QUARTZ FROM THE AREA OF MURCIA. PIECE WITH A VERY GOOD SHADE, PIECE THAT CAN'T BE MISSING IN YOUR SHOWCASE.
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.
