Properties of Obsidian lan Skarn
ukuran gandum
ora ditrapake
grained nggoleki
rengat
conchoidal
ora duwe aturan baku
tilas
putih
cahya kanggo coklat peteng
porosity
banget kurang keropos
kurang keropos
luster
vitreous
waxy lan kurang
kekuatan compressive
ora Sumadhiya
kateguhan
ora kasedhiya
2.4
tartamtu gravitasi
2.6-2.7
2.86
Kapadhetan
2.6 g / cm 3
2.8-2.9 g / cm 3
resistance
tahan panas, impact tahan
tahan panas