Properties of Obsidian lan Alkali Feldspar Granit
ukuran gandum
ora ditrapake
gedhe lan coarse grained
rengat
conchoidal
ora kasedhiya
porosity
banget kurang keropos
kurang keropos
luster
vitreous
kurang kanggo grainy karo bagean kala-kala pearly lan vitreous
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
2.6-2.7
2.6-2.7
Kapadhetan
2.6 g / cm 3
2.6-2.8 g / cm 3
resistance
tahan panas, impact tahan
tahan panas, nyandhang tahan