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 Tanzanite infinity jewelry. A pair of tanzanite earrings makes for an unforgettable gift. A rare and precious gem, tanzanite is sure to please. Sunny and affordable, citrine earrings look perfect when set in glistening yellow gold mountings. Traditionally, citrine is given on anniversaries but is perfect for any occasion.