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