Rare 12 Sided Herkimer Diamond Crystal Pendulum or Pendant with Pouch and Necklace Chain RARE 12 SIDED HERKIMER DIAMOND CRYSTAL PENDULUM OR PENDANT WITH POUCH AND NECKLACE CHAIN A rare and beautiful crystal quartz pendulum or pendant. Includes a velvet protective bag, a 7" detachable pendulum chain and a 20" hemp chain for necklace.. Measures almost 2" in length with bail. A beautiful piece.