Amethyst is a silicate mineral, formed from silica rich solutions with traces of iron . These solutions often enter cavities and form beautiful crystals . In the right conditions the iron in the crystals are irradiated , so producing the rich purple colour of the stone. The crystals are often found in strange shaped rock nodules called geodes. These can be larger than a human and once carefully broken open reveal the purple treasure inside.
Many huge pieces are found in Brazil .
Amethyst was hightly prized in Medieval times as a regal stone.
Amethyst is the birthstone for Aquarius and Pisces. It is said to protect the wearer, relieve negativity and even prevent drunkenness!
This suggestion dates back to the times of the Ancient Greeks , who fashioned drinking vessels from Amethyst, believing it would protect against drunkenness . However, perhaps some desception was involved, as the vessels could be filled with water , but the colour of the Amethyst made it appear that they were filled with red wine, and therefore you would not get intoxicated !