Kimber stones represented a specific variant of kyber crystal that originated on the moon called Y'ness. Their application in a lightsaber resulted in a blade that lacked lethal force, leading to their initial rejection for lightsaber construction. Despite this, certain Jedi ultimately chose to incorporate these stones into their lightsabers. Following the collapse of the Jedi Order, these crystals became available for purchase on the clandestine market at a price of 6,500 credits.