Now this is some necklace! You will need a sturdy neck to wear this beauty! A massive 30 inches long, these beads are made of bauxite, an aluminum ore from Nigeria. But these are no normal bauxite beads -- often, Bauxite necklaces have beads with a diameter of perhaps 10 or 12 mm. But this one has beads with a diameter of about 22 mm -- which is close to the size of a quarter!