Gem-A gemmology tutor Lily Faber FGA EG explores the history of amethyst and its significance as the birthstone of February - the most romantic month of the year.
Amethyst is a well-known, purple variety of quartz that is February’s birthstone. Fashioned pieces can vary from a lighter lavender to a deep, saturated purple.
In ancient Greece, it was believed that if worn or used as a drinking vessel, the wearer would be protected from becoming drunk, hence, its name is derived from the Greek words meaning “not drunken”. It is also believed by some that the stone will bring you luck, serve as an antidote to poison, increase your intelligence and protect you from magic spells.
Amethyst quartz with ribbon-like inclusions. Image by Pat Daly.
Various localities include India, the USA, Australia and Brazil, which is one of the most important sources today. Historically, it was mined in Siberia and Saxony (Germany).
In keeping with February’s holiday of St. Valentine’s Day, it is said that St. Valentine wore a signet ring set with an amethyst intaglio carved with an image of Cupid. Amethyst was also worn in the finger rings of bishops, and can be found in the British regalia fashioned as a faceted orb sitting atop the Star of Africa diamond set in the sceptre.
Amethyst quartz with tiger stripe inclusions. Image by Pat Daly.
Historically, aristocratic and royal families the world over have prized the gem in different eras. One such monarch was Queen Alexandra, wife of King Edward VII, who owned a gorgeous amethyst tiara containing several high quality large, oval-shaped stones from the mines of Siberia. She also commissioned a necklace that could also be converted into a tiara. These pieces are sadly no longer in the Royal Collection as they were sold at auction in the 1940s.
Amethyst quartz jewellery set. Image by Pat Daly.
Crystals, inclusions and colours
If sold as a rough specimen, Amethysts are often seen as individual crystals with one broken end where it was detached from the host rock. More often, they are sold in the form of a geode cluster. Geodes are cavities or pockets that are lined with many crystals of various sizes. Often, the colour is concentrated in the tips of the crystals, thus leading to a great variety in saturation of colour from pale to deep purple.
An inclusion that is typical, if not diagnostic of amethyst, is the tiger stripe. It is a healed fracture that can occur when the stone twins. Amethysts are either one consistent colour or have angular colour banding with alternating light and dark colour zones.
Care and Caution
Amethyst is a relatively hard stone at 7 on the Mohs’ Scale of Hardness, but only just! It is softer than other stones like sapphires, and as such, can be susceptible to chips and fracture.
Some stones’ colour can fade when exposed for too long to sunlight, so take care if displaying in a vitrine or shop window. When cleaning, do not use an ultrasonic cleaner in case there are any small inclusions or internal fractures that may expand during cleaning. Use warm soapy water and a very soft brush to clear away dirt.
Interested in finding out more about gemmology? Sign-up to one of Gem-A's courses or workshops.
If you would like to subscribe to Gems&Jewellery and The Journal of Gemmology please visit Membership.
Cover image: Amethyst crystal quartz with detachment marks. Image by Pat Daly, Gem-A.
Guy Lalous ACAM EG delves into an article on Indonesian Bumble Bee Stone (BBS) from The Journal of Gemmology Volume 36, No.3, and presents his edited take on the most essential information, findings and lessons to be learnt. Continue reading here...
Gem-A tutor Barbara Kolator B.Sc. M.Sc. FGA DGA EG shares some highlights from her recent trip to the Institut de Gemmologie de Madagascar in Antananarivo, which is a proud Gem-A Accredited Teaching Centre (ATC).
Famous for her ostentatious sense of style, 18th century French Queen Marie Antoinette was back as the centre of attention at Sotheby's in November thanks to the record-breaking sale of her natural pearl and diamond pendant. Here, Beth West FGA DGA EG considers the history behind this fascinating piece.
Looking for the perfect festive gift for a December baby? Gem-A tutor Lily Faber FGA DGA EG considers the December birthstone tanzanite and how this relatively new gemstone compares to its purple and blue-hued rivals.