POINTS OF ROCK CRYSTAL QUARTZ WITH DOUBLE TERMINATED TERMINATION. SIZE BETWEEN 5 TO 7 CENTIMETERS
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 oxide class, while in the Dana classification, it is considered a tectosilicate.
There are multiple varieties of quartz , colors and types.
