Properties of Obsidian lan Breccia
ukuran gandum
ora ditrapake
medium kanggo coarse grained
rengat
conchoidal
ora rata
porosity
banget kurang keropos
kurang keropos
luster
vitreous
kurang kanggo pearly
kekuatan compressive
ora Sumadhiya
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
2.6-2.7
2.86-2.87
Kapadhetan
2.6 g / cm 3
0 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan, nyandhang tahan