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. Emerald is associated with Venus, the Greek goddess of love and beauty. They say an emerald pendant can protect lovers from unfaithfulness.