Properties of Gneiss and Dacite

Gneiss

Dacite

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1 Properties

1.1 Physical Properties

1.1.1 Hardness

72-2.25

1 7

1.1.2 Grain Size

Medium to Coarse Grained

Medium to Fine Coarse Grained

1.1.3 Fracture

Irregular

Conchoidal

1.1.4 Streak

White

1.1.5 Porosity

Very Less Porous

Less Porous

1.1.6 Luster

Dull

Subvitreous to Dull

1.1.7 Compressive Strength

125.00 N/mm²NA

0.15 450

1.1.8 Cleavage

Poor

Perfect

1.1.9 Toughness

1.2

Not Available

1.1.10 Specific Gravity

2.5-2.72.86-2.87

0 8.4

1.1.11 Transparency

Translucent to Opaque

Translucent

1.1.12 Density

2.6-2.9 g/cm³2.77-2.771 g/cm³

0 1400

1.2 Thermal Properties

1.2.1 Specific Heat Capacity

NA0.92 kJ/Kg K

0.14 3.2

1.2.2 Resistance

Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Gneiss vs Dacite Properties

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