Geode with crystals of an amethyst of great beauty.
Amethyst is considered a semi-precious stone.
Wooden base included.
Total measures: Height 18cm, base 25x16cm.Geode height: 18 cm.
Amethyst is the most prized variety of quartz.
The most perfect amethysts are carved for jewellery, and the rest are used to make art objects.
Traditionally, amethyst was among the most valued gemstones (along with diamond, ruby, sapphire and emerald).
It is a mineral of magmatic origin. It forms in seams with solutions rich in iron oxides, which give it its characteristic purple colour at temperatures below 300 °C.
Amethyst is most commonly found lining the interior of agates in the form of geodes, sometimes gigantic.
It can also be found in the form of druses (crystals that cover the surface of a stone) or in veins, accompanied by other minerals.