Quartz

Quartz

The most common mineral – the chemical compound is quartz - a compound of silicon with oxygen in the most common form known as ordinary sand with a very simple chemical formula – SiO2. It is obvious, if we include, that oxygen and silicon …

Crystals and their structure

Crystals and their structure.

Already in antiquity it was noticed, that a common mineral called quartz can exist in the form of polyhedrons bounded by flat faces. These polyhedra constantly have the shape of a hexagonal column ended with the walls of the pyramids. Chociaż poszczególne formy geometryczne