(Conversion: 2.5cm = 25mm = approx. 1″ inch) Personalise this necklace with your choice of Add On birthstone or initial. Gemstone necklaces are packaged in a lovely randomly chosen gift pouch with a description card, ready to give or keep for yourself. Amethyst – is a “stone of meditation”, being excellent in conducting the energy of calm and peacefulness to help one to enter and maintain the state. It opens and activates the crown chakra. Please note: due to monitor differences, colours may vary slightly.