Properties of Ganister lan Obsidian
ukuran gandum
coarse utawa nggoleki
ora ditrapake
rengat
splintery
conchoidal
porosity
Highly keropos
banget kurang keropos
cleavage
sampurna
non-ana
kateguhan
2.6
ora kasedhiya
tartamtu gravitasi
2.2-2.8
2.6-2.7
Kapadhetan
2.2-2.8 g / cm 3
2.6 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan
tahan panas, impact tahan