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