Properties of Porphyry and Gneiss

Porphyry

Gneiss

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1 Properties

1.1 Physical Properties

1.1.1 Hardness

6-77

1 7

1.1.2 Grain Size

Fine Grained

Medium to Coarse Grained

1.1.3 Fracture

Irregular

1.1.4 Streak

White

1.1.5 Porosity

Less Porous

Very Less Porous

1.1.6 Luster

Dull

1.1.7 Compressive Strength

NA125.00 N/mm²

0.15 450

1.1.8 Cleavage

Imperfect

Poor

1.1.9 Toughness

1.7

1.2

1.1.10 Specific Gravity

2.5-42.5-2.7

0 8.4

1.1.11 Transparency

Translucent to Opaque

1.1.12 Density

2.5-2.52 g/cm³2.6-2.9 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, Impact Resistant

Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant

Porphyry vs Gneiss Properties

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