Properties of Coquina lan Anthracite
ukuran gandum
coarse grained
medium kanggo nggoleki coarse grained
rengat
ora duwe aturan baku
conchoidal
porosity
Highly keropos
kurang keropos
luster
kurang kanggo vitreous kanggo submetallic
mengilap
cleavage
ora kasedhiya
non-ana
kateguhan
ora kasedhiya
ora kasedhiya
tartamtu gravitasi
1.10-2.24
1.1-1.4
Kapadhetan
2.8-2.9 g / cm 3
1.25-2.5 g / cm 3
kapasitas panas tartamtu
ora Sumadhiya
resistance
tahan panas, impact tahan, meksa tahan, nyandhang tahan
tahan panas, banyu tahan