A very aesthetic cluster of four, lustrous, black, interpenetrating twinned thorite crystals from Ambatofotsy, Madagascar. All of the crystals are undamaged. This is of SUPERB quality. 1.6 x 1.4 x 1.3 cm[NOTE: The locality of this specimen has been questioned, see http://www.mindat.org/mesg-7-35240.html]