The exterior of a rough diamond crystal is not brilliant like that of a cut diamond but indeed hard looking and luminous. It has somewhat the appearance of a piece of alum. The ”nyf”, defining the exterior layer cocooning the diamond, looks like a grey skin over a brilliant body. Even though, at first, it doesn't appear like the shine of other crystals, there is something about it which attracts the eye and unmistakably differentiates it from all other stones. It is sometimes rough but one unmistakably sees that the roughness covers peerless qualities.