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