WE PRESENT THIS LOT OF 54 UNITS OF AMETRINUM FROM BRAZIL. HIGH QUALITY CRYSTALS OF THIS TYPE OF AMETHYST IN 4X4 BOXES
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.
