WE PRESENT YOU A LOT OF 15 AMETHYST IN 4X4 CAJISTS. DIFFERENT SIZES. AMETHYST FROM BRAZIL * THE PHOTOS ON THE LOTS ARE SAMPLE PHOTOS, THE MINERALS RECEIVED WILL BE OF SIMILAR QUALITY. FOR ANY DOUBT, CONTACT US. * THE PHOTOS ON THE LOTS ARE SAMPLE PHOTOS, THE MINERALS RECEIVED WILL BE OF SIMILAR QUALITY. FOR ANY DOUBT, CONTACT US.
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.
