Cacoxenite Amethyst

Cacoxenite forms within crystal or amethyst as an inclusion. It is a rather rare occurance, and can create a visually spectacular stone.

Amethyst is a purple variety of quartz and owes its violet color to irradiation, iron impurities (in some cases in conjunction with transition element impurities), and the presence of trace elements, which result in complex crystal lattice substitutions.

Amethyst has a hardness of 6.5-7 on Moh's Scale.