PIECE OF SEVERAL ROCK CRYSTAL QUARTZ CRYSTALS, TRANSPARENT AT THE TIP AND MILKY AT THE BASE. AMONG THE CRYSTALS WE CAN SEE CHALCOPYRITE ON ITS SIDES AND IN ONE OF THE CRYSTALS ON ITS SIDE A SMALL CRYSTAL OF APATITE. CURIOUS PIECE THAT MAY NOT BE MISSING IN YOUR COLLECTION
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.
