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