Properties of Slate lan Variolite
ukuran gandum
banget nggoleki-grained
ora ditrapake
rengat
splintery
conchoidal
tilas
cahya kanggo coklat peteng
putih kanggo werna abu-abu
porosity
kurang keropos
kurang keropos
luster
kurang
ora kasedhiya
cleavage
slaty
ora kasedhiya
tartamtu gravitasi
2.65-2.8
2.8-3
Kapadhetan
2.6-2.8 g / cm 3
2.9-3.1 g / cm 3
resistance
tahan panas, impact tahan, meksa tahan, nyandhang tahan
tahan panas, meksa tahan, nyandhang tahan