Properties of Obsidian lan Andesit
ukuran gandum
ora ditrapake
banget nggoleki-grained
rengat
conchoidal
ora rata
porosity
banget kurang keropos
kurang keropos
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
1.1
tartamtu gravitasi
2.6-2.7
2.5-2.8
Kapadhetan
2.6 g / cm 3
2.11-2.36 g / cm 3
resistance
tahan panas, impact tahan
tahan panas, meksa tahan, nyandhang tahan