Properties of Coal and Greywacke

Coal

Greywacke

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1 Properties

1.1 Physical Properties

1.1.1 Hardness

1-1.56-7

1 7

1.1.2 Grain Size

Medium to Fine Coarse Grained

Angular and Fine

1.1.3 Fracture

Conchoidal

1.1.4 Streak

Black

White

1.1.5 Porosity

Less Porous

Highly Porous

1.1.6 Luster

Dull to Vitreous to Submetallic

Dull

1.1.7 Compressive Strength

NANA

0.15 450

1.1.8 Cleavage

Non-Existent

Perfect

1.1.9 Toughness

Not Available

2.6

1.1.10 Specific Gravity

1.1-1.42.2-2.8

0 8.4

1.1.11 Transparency

Opaque

1.1.12 Density

1100-1400 g/cm³2.6-2.61 g/cm³

0 1400

1.2 Thermal Properties

1.2.1 Specific Heat Capacity

1.32 kJ/Kg KNA

0.14 3.2

1.2.2 Resistance

Heat Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Coal vs Greywacke Properties

Properties of Coal and Greywacke play an important role in determining the type of rock. Along with Coal vs Greywacke properties, get to know more about Coal Definition and Greywacke Definition. For the ease of understanding, the properties of rocks are divided into physical and thermal properties. Rocks have a variety of properties like hardness, color, specific gravity, fracture, cleavage, luster etc. Know all about physical and thermal properties of Coal and Greywacke.