PIECE OF AMETHYST QUARTZ FROM MURCIA, WITH A LARGE CRYSTAL IN THE UPPER PART AND A DARKER TONALITY. IN THE CENTRAL PART WE CAN SEE SOME CRYSTALS OF A MORE TRANSPARENT TONALITY
The Amethyst is a variety of Quartz. Sample hue, violet.
The intensity of the color is related to the amount of iron it contains.
Normally, the tips can be darker until you reach the base, which will present a more transparent tone.