To see a world in a grain of sand and heaven in a wild flower, hold infinity in the palm of your hand and eternity in an hour. -William Blake. Your spirituality is on display with Amethyst infinity jewelry. An amethyst pendant is said to bring spirituality, tranquility and peace to the wearer. It is even said to help one succeed in business. Yellow gold brings out the bronze and golden colors inside a smoky quartz pendant. White gold will highlight the brown and grey tones of the gem. Either way, you can't go wrong.