SPECTACULAR PIECE OF GIANT QUARTZ ON ORTHOSA OR MICROCLIMATE OF LA CABRERA IN MADRID. VERY GOOD PIECE WITH A FULLY TRANSPARENT GIANT QUARTZ CENTRAL CRSITAL. VERY GOOD PIECE WHAT MAY 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.
