LARGE AMETHYST GEODE WEIGHING 8.7 KILOS. AMETHYST QUARTZ CRYSTALS OF DARK TONE WHAT MAKES THIS PIECE VERY SPECIAL AND GIVES VALUE TO THIS GEODE
Amethyst is a variety of Quartz , in that case violet in color. The color can be darker or lighter, depending on the amount of iron it contains. The tips are usually darker until they reach the base, which is usually more transparent.
Quartz is the most common mineral, the most abundant that can be found on earth.
It is composed of silicon and oxygen with SiO₂ formula.
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 many types of quartz in varieties, colors and types.
