Properties of Obsidian lan Websterite
ukuran gandum
ora ditrapake
coarse grained
rengat
conchoidal
ora rata
tilas
putih
putih, greenish putih utawa abu-abu
porosity
banget kurang keropos
kurang keropos
luster
vitreous
kurang kanggo vitreous kanggo submetallic
kekuatan compressive
ora Sumadhiya
cleavage
non-ana
ora duwe aturan baku
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
2.6-2.7
3.2-3.5
Kapadhetan
2.6 g / cm 3
3.1-3.6 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan
impact tahan, meksa tahan, nyandhang tahan