Properties of Scoria lan Anthracite
ukuran gandum
grained nggoleki
medium kanggo nggoleki coarse grained
rengat
conchoidal
conchoidal
porosity
Highly keropos
kurang keropos
luster
subvitreous kanggo kurang
mengilap
cleavage
sampurna
non-ana
kateguhan
2.1
ora kasedhiya
tartamtu gravitasi
ora Sumadhiya
1.1-1.4
Kapadhetan
ora Sumadhiya
1.25-2.5 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan, meksa tahan, nyandhang tahan
tahan panas, banyu tahan