Properties of Obsidian lan Dacite
ukuran gandum
ora ditrapake
medium kanggo nggoleki coarse grained
rengat
conchoidal
conchoidal
porosity
banget kurang keropos
kurang keropos
luster
vitreous
subvitreous kanggo kurang
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
sampurna
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
2.6-2.7
2.86-2.87
Kapadhetan
2.6 g / cm 3
2.77-2.771 g / cm 3
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan, nyandhang tahan