charlesite has only been found in a few specific locations in the world. the first was its place of discovery in franklin mine in franklin, sussex county, new jersey. it was located immediately above the 800 level, about 15 feet into the ore from the hanging wall. the ore mostly consisted of franklinite and willemite and several other minor minerals. the crystals found at this location were up to 6mm in length and were suspected to have grown alongside clinohedrite crystals.