Properties of Hornfels lan Tephrite
ukuran gandum
grained nggoleki
medium kanggo nggoleki coarse grained
rengat
conchoidal
ora rata
tilas
dingerteni
bluish ireng
porosity
Highly keropos
banget kurang keropos
luster
mengilap
subvitreous kanggo kurang
cleavage
sampurna
crenulation lan mrembet
kateguhan
durung ketemu
2.4
tartamtu gravitasi
3.4-3.9
2.86
Kapadhetan
0.25-0.30 g / cm 3
2.8-2.9 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan
tahan panas, impact tahan