Properties of Obsidian lan Hornfels
ukuran gandum
ora ditrapake
grained nggoleki
rengat
conchoidal
conchoidal
porosity
banget kurang keropos
Highly keropos
cleavage
non-ana
sampurna
kateguhan
ora kasedhiya
durung ketemu
tartamtu gravitasi
2.6-2.7
3.4-3.9
Kapadhetan
2.6 g / cm 3
0.25-0.30 g / cm 3
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan