Properties of Picrite lan Rhyolite
ukuran gandum
grained nggoleki
gedhe lan coarse grained
rengat
ora rata
sub-conchoidal
tilas
putih, greenish putih utawa abu-abu
wernane
porosity
kurang keropos
Highly keropos
luster
subvitreous kanggo kurang
earthy
cleavage
cacat
ora kasedhiya
tartamtu gravitasi
2.75-2.92
2.65-2.67
Kapadhetan
1.5-2.5 g / cm 3
2.4-2.6 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas
tahan panas, nyandhang tahan