the amethyst pendant is considered to hold the 'Papal stone', prevent drunkeness and from Greek mythology:- amethyst pendants contain 'the gemstone of the Gods'. Being Februarys' birthstone it is the Zodiac gem of Pisces and the preferred gem of St.Valantines. Amethyst pendants are also associated with all kinds of 6th anniversary occasions.
"diamonds are forever" and also "A girls best friend".
diamonds are the birthstone for April and the anniversary gems for 10th, 60th and 70th celebrations.