Hardness
Grain Size
Fracture
Streak
Porosity
Luster
Compressive Strength
Cleavage
Toughness
Specific Gravity
Transparency
Density
Specific Heat Capacity
Resistance
Grainy, Pearly and Vitreous
Heat Resistant, Impact Resistant, Pressure Resistant
Medium to Fine Coarse Grained
Transparent to Translucent
Heat Resistant, Pressure Resistant, Wear Resistant