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 Onyx infinity jewelry. A perfect stone for nighttime wear, a black onyx pendant looks elegant and stylish in white or yellow gold. A sapphire is said to bring serenity and purity to the wearer. Wear a pink sapphire pendant for serenity and purity with a splash of fun and irreverence.