Properties of Obsidian lan Scoria
ukuran gandum
ora ditrapake
grained nggoleki
rengat
conchoidal
conchoidal
porosity
banget kurang keropos
Highly keropos
luster
vitreous
subvitreous kanggo kurang
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
sampurna
kateguhan
ora kasedhiya
2.1
tartamtu gravitasi
2.6-2.7
ora Sumadhiya
Kapadhetan
2.6 g / cm 3
ora Sumadhiya
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan, nyandhang tahan