Properties of Pumice and Gneiss

Pumice

Gneiss

Properties of Gneiss and Pumice

Properties

Physical Properties

Hardness

Grain Size

Fine Grained

Medium to Coarse Grained

Fracture

Planar

Irregular

Streak

White, Greenish White or Grey

White

Porosity

Highly Porous

Very Less Porous

Luster

Earthy

Dull

Compressive Strength

51.20 N/mm²

125.00 N/mm²

Cleavage

Perfect

Poor

Toughness

1.2

Specific Gravity

2.86

2.5-2.7

Transparency

Opaque

Translucent to Opaque

Density

0.25-0.3 g/cm³

2.6-2.9 g/cm³

Thermal Properties

Specific Heat Capacity

0.87 kJ/Kg K

Not Available

Resistance

Impact Resistant, Pressure Resistant

Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant

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Pumice vs Gneiss Properties

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