Properties of Obsidian lan Gossan
ukuran gandum
ora ditrapake
nggoleki grained medium
rengat
conchoidal
conchoidal
tilas
putih
putih kanggo werna abu-abu
porosity
banget kurang keropos
Highly keropos
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
2.6-2.7
2.0
Kapadhetan
2.6 g / cm 3
ora Sumadhiya
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan