Properties of Obsidian lan Coquina
ukuran gandum
ora ditrapake
coarse grained
rengat
conchoidal
ora duwe aturan baku
porosity
banget kurang keropos
Highly keropos
luster
vitreous
kurang kanggo vitreous kanggo submetallic
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
ora kasedhiya
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
2.6-2.7
1.10-2.24
Kapadhetan
2.6 g / cm 3
2.8-2.9 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan
tahan panas, impact tahan, meksa tahan, nyandhang tahan