Iimpawu: Umxholo wekhabhoni esisigxina, umxholo ophantsi wothuthu, umbane ophezulu kunye nokuhanjiswa kwe-thermal. Isulfure ephantsi, i-porosity ephantsi kunye nomxholo ophantsi oguquguqukayo. Amasuntswana owomileyo, acocekileyo naphakathi
Ubungakanani: 0.2-2mm, 1-5mm ,3-8mm, 5-15mmor ngokwemfuno yomthengi.
Ukupakisha: kwi-25kg ibhegi encinci, ibhegi enkulu eyi-1mt, okanye ngokwemfuno yomthengi.