Amethyst truly is an ancient stone with jewellery pieces dating back to 2000BC. A symbol of royalty, piety and calm, a large stone is a feature of the British crown jewels and it is also said that St Valentine even wore a gold amethyst ring. Amethyst is celebrated as the symbolic gemstone for seventeenth wedding anniversaries, the birthstone for February and the astrological sign Pisces in the zodiac calendar.