Properties of Obsidian lan Basanite
ukuran gandum
ora ditrapake
grained nggoleki
rengat
conchoidal
ora rata, splintery utawa conchoidal
porosity
banget kurang keropos
Highly keropos
luster
vitreous
waxy lan kurang
kekuatan compressive
ora Sumadhiya
kateguhan
ora kasedhiya
1.5
tartamtu gravitasi
2.6-2.7
2.5-2.8
transparan
tembus
tembus kanggo opaque
Kapadhetan
2.6 g / cm 3
2.7 g / cm 3
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan, nyandhang tahan