Properties of Rhomb Porphyry lan Anthracite
ukuran gandum
grained nggoleki
medium kanggo nggoleki coarse grained
rengat
conchoidal
conchoidal
porosity
banget kurang keropos
kurang keropos
luster
subvitreous kanggo kurang
mengilap
kekuatan compressive
ora Sumadhiya
cleavage
sampurna
non-ana
kateguhan
2.7
ora kasedhiya
tartamtu gravitasi
2.86
1.1-1.4
Kapadhetan
2.8-2.9 g / cm 3
1.25-2.5 g / cm 3
resistance
tahan panas, meksa tahan
tahan panas, banyu tahan