Properties of Tephrite lan Pumice
ukuran gandum
medium kanggo nggoleki coarse grained
grained nggoleki
tilas
bluish ireng
putih, greenish putih utawa abu-abu
porosity
banget kurang keropos
Highly keropos
luster
subvitreous kanggo kurang
earthy
cleavage
crenulation lan mrembet
sampurna
tartamtu gravitasi
2.86
2.86
Kapadhetan
2.8-2.9 g / cm 3
0.25-0.3 g / cm 3
resistance
tahan panas, impact tahan
impact tahan, meksa tahan