Properties of Gneiss and Porphyry

Gneiss

Porphyry

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1 Properties

1.1 Physical Properties

1.1.1 Hardness

76-7

1 7

1.1.2 Grain Size

Medium to Coarse Grained

Fine Grained

1.1.3 Fracture

Irregular

1.1.4 Streak

White

1.1.5 Porosity

Very Less Porous

Less Porous

1.1.6 Luster

Dull

1.1.7 Compressive Strength

125.00 N/mm²NA

0.15 450

1.1.8 Cleavage

Poor

Imperfect

1.1.9 Toughness

1.2

1.7

1.1.10 Specific Gravity

2.5-2.72.5-4

0 8.4

1.1.11 Transparency

Translucent to Opaque

1.1.12 Density

2.6-2.9 g/cm³2.5-2.52 g/cm³

0 1400

1.2 Thermal Properties

1.2.1 Specific Heat Capacity

NANA

0.14 3.2

1.2.2 Resistance

Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant

Heat Resistant, Impact Resistant

Gneiss vs Porphyry Properties

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