Properties of Obsidian lan Siltstone
ukuran gandum
ora ditrapake
grained nggoleki
rengat
conchoidal
conchoidal
porosity
banget kurang keropos
Highly keropos
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
2.6
tartamtu gravitasi
2.6-2.7
2.54-2.73
Kapadhetan
2.6 g / cm 3
2.6-2.7 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan, banyu tahan