Properties of Obsidian lan Talc Karbonat
ukuran gandum
ora ditrapake
grained nggoleki
porosity
banget kurang keropos
kurang keropos
cleavage
non-ana
sampurna
kateguhan
ora kasedhiya
1
tartamtu gravitasi
2.6-2.7
2.86
Kapadhetan
2.6 g / cm 3
2.8-2.9 g / cm 3
resistance
tahan panas, impact tahan
tahan panas, nyandhang tahan