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. Ruby is known as the gem of courage. Wearing a ruby pendant can help you get through the trials and tribulations of life.