Emerald Village Black Light Mine Tour Fall Experience the magical world of the Bon Ami Mine at night! On 10 special nights each year we offer guided night-time black light tours in the mine, beginning at dark. See vivid greens, reds, and blues come to life before your eyes! Black light is the common name for ultraviolet light, which is invisible to humans. Discover a hidden world of beauty at night in the Bon Ami Mine, one of the few places in the world where you can see this rare phenomenon. Extensive deposits of Hyalite Opal and other rare minerals respond with fantastic colors. This special guided tour lasts about 45 minutes. Bring your camera for some awesome photos! Reservations are required and can be made on our website at www.emeraldvillage.com