Properties of Gneiss and Obsidian

Gneiss

Obsidian

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1 Properties

1.1 Physical Properties

1.1.1 Hardness

75-5.5

1 7

1.1.2 Grain Size

Medium to Coarse Grained

Not Applicable

1.1.3 Fracture

Irregular

Conchoidal

1.1.4 Streak

White

1.1.5 Porosity

Very Less Porous

1.1.6 Luster

Dull

Vitreous

1.1.7 Compressive Strength

125.00 N/mm²0.15 N/mm²

0.15 450

1.1.8 Cleavage

Poor

Non-Existent

1.1.9 Toughness

1.2

Not Available

1.1.10 Specific Gravity

2.5-2.72.6-2.7

0 8.4

1.1.11 Transparency

Translucent to Opaque

Translucent

1.1.12 Density

2.6-2.9 g/cm³2.6 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

Gneiss vs Obsidian Properties

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