Properties of Basanite lan Anthracite
ukuran gandum
grained nggoleki
medium kanggo nggoleki coarse grained
rengat
ora rata, splintery utawa conchoidal
conchoidal
porosity
Highly keropos
kurang keropos
luster
waxy lan kurang
mengilap
kateguhan
1.5
ora kasedhiya
tartamtu gravitasi
2.5-2.8
1.1-1.4
transparan
tembus kanggo opaque
opaque
Kapadhetan
2.7 g / cm 3
1.25-2.5 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan, nyandhang tahan
tahan panas, banyu tahan