The 18K Diamond Tolomeo Pendant is a jeweled representation of the ptolemaic hypothesis, the two thousand year-old, astronomical theory that earth was the center of the universe. Moveable rings of diamonds chart the planetary orbits from the moon to saturn. This remarkable treasure places you at the heart of the cosmos. Product Details 18K gold Diamonds 5.005cts Length: 69mm/2.75"; Width: 47.5mm/1.9" Italy