Tsawg hardness, ib txheej ntawm cov cleavage heev heev, thiab morphology ntawm ntau yam nta yuav raug txheeb xyuas. Nthuav thiab loj heev gypsum tuaj yeem txawv los ntawm carbonate los ntawm nws cov hardness qis thiab tsis-foaming nyob rau hauv muaj cov kua qaub.
Ib qho ntawm cov txheej txheem minerals nyob rau hauv hardness faib.
