Properties of Anthracite lan Variolite
ukuran gandum
medium kanggo nggoleki coarse grained
ora ditrapake
rengat
conchoidal
conchoidal
tilas
ireng
putih kanggo werna abu-abu
porosity
kurang keropos
kurang keropos
luster
mengilap
ora kasedhiya
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
2.3
tartamtu gravitasi
1.1-1.4
2.8-3
Kapadhetan
1.25-2.5 g / cm 3
2.9-3.1 g / cm 3
resistance
tahan panas, banyu tahan
tahan panas, meksa tahan, nyandhang tahan