Properties of Obsidian lan Tuff
ukuran gandum
ora ditrapake
grained nggoleki
rengat
conchoidal
ora rata
porosity
banget kurang keropos
Highly keropos
luster
vitreous
vitreous kanggo kurang
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
2.6-2.7
2.73
Kapadhetan
2.6 g / cm 3
1-1.8 g / cm 3
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan, nyandhang tahan