Properties of Obsidian lan Rhyolite
ukuran gandum
ora ditrapake
gedhe lan coarse grained
rengat
conchoidal
sub-conchoidal
porosity
banget kurang keropos
Highly keropos
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
2
tartamtu gravitasi
2.6-2.7
2.65-2.67
Kapadhetan
2.6 g / cm 3
2.4-2.6 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan
tahan panas, nyandhang tahan