Lu'u-ulu'u Hardness ma'auni matsa kai: Lu'u-ulu'u matsa kai dace da kayan aiki daban-daban kamar Rocket Hardness ma'auni, Vickers Hardness ma'auni, Nugget Hardness ma'auni da sauransu.

Yana da wani ƙwanƙwasa da aka ƙayyade nauyi na ingancin lu'u-lu'u na halitta, da aka gila a cikin misali geometry tare da wasu fasaha bukatun, ƙwanƙwasa matsa kai (ƙwanƙwasa kusurwa ne 120 digiri), positive huɗu ƙwanƙwasa matsa kai (dangane da ƙwanƙwasa kusurwa raba zuwa uku: 130 digiri, 136 digiri, 172 digiri 30).