Properties of Basalt lan Obsidian
ukuran gandum
grained nggoleki
ora ditrapake
rengat
conchoidal
conchoidal
tilas
putih kanggo werna abu-abu
putih
porosity
kurang keropos
banget kurang keropos
luster
ora kasedhiya
vitreous
cleavage
ora kasedhiya
non-ana
kateguhan
2.3
ora kasedhiya
tartamtu gravitasi
2.8-3
2.6-2.7
Kapadhetan
2.9-3.1 g / cm 3
2.6 g / cm 3
resistance
tahan panas, meksa tahan, nyandhang tahan
tahan panas, impact tahan