Properties of Slate lan Tephrite
ukuran gandum
banget nggoleki-grained
medium kanggo nggoleki coarse grained
rengat
splintery
ora rata
tilas
cahya kanggo coklat peteng
bluish ireng
porosity
kurang keropos
banget kurang keropos
luster
kurang
subvitreous kanggo kurang
cleavage
slaty
crenulation lan mrembet
tartamtu gravitasi
2.65-2.8
2.86
Kapadhetan
2.6-2.8 g / cm 3
2.8-2.9 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan, nyandhang tahan
tahan panas, impact tahan