Because amethyst is one of the more popular stones, it seemed worth learning a bit more of how it was used throughout history. As the excerpts below highlight, amethyst was used for more than preventing drunkenness.
From A Lapidary of Sacred Stones by Claude Lecouteux, p47-48
“In the thirteenth century, it was said the amethyst prevented the devil from causing harm and preventd a person from seeing ‘ghosts’ (fantasme). It also provided protection from the entity known as a nightmare and from fevers, it granted riches, and made one humble, courteous, and gracious.”
“Etched with the moon and sun and hung around the neck with hairs from a cynocephalus* and feathers from a swallow, it protects one from evil spells. Its magical properties are increased if set in gold or silver and if a man on horseback holding a scepter is carved on it.”
* cynocephalus likely refers to some type of baboon
“If one finds an image of an amethyst of a man with a sword in hand seated on a dragon, and this stone is then set in a ring of lead or iron, the wearer will obtain the obedience of all the spirits, tnd they will revela where treasures are hidden and answer whatever questions he may ask.”