Properties of Greywacke and Coal

Greywacke

Coal

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1 Properties

1.1 Physical Properties

1.1.1 Hardness

6-71-1.5

1 7

1.1.2 Grain Size

Angular and Fine

Medium to Fine Coarse Grained

1.1.3 Fracture

Conchoidal

1.1.4 Streak

White

Black

1.1.5 Porosity

Highly Porous

Less Porous

1.1.6 Luster

Dull

Dull to Vitreous to Submetallic

1.1.7 Compressive Strength

NANA

0.15 450

1.1.8 Cleavage

Perfect

Non-Existent

1.1.9 Toughness

2.6

Not Available

1.1.10 Specific Gravity

2.2-2.81.1-1.4

0 8.4

1.1.11 Transparency

Opaque

1.1.12 Density

2.6-2.61 g/cm³1100-1400 g/cm³

0 1400

1.2 Thermal Properties

1.2.1 Specific Heat Capacity

NA1.32 kJ/Kg K

0.14 3.2

1.2.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Heat Resistant

Greywacke vs Coal Properties

Properties of Greywacke and Coal play an important role in determining the type of rock. Along with Greywacke vs Coal properties, get to know more about Greywacke Definition and Coal 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 Greywacke and Coal.