Properties of Obsidian and Pegmatite

Obsidian

Pegmatite

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1 Properties

1.1 Physical Properties

1.1.1 Hardness

5-5.57

1 7

1.1.2 Grain Size

Not Applicable

Medium to Coarse Grained

1.1.3 Fracture

Conchoidal

1.1.4 Streak

White

1.1.5 Porosity

Very Less Porous

Less Porous

1.1.6 Luster

Vitreous

Grainy, Pearly and Vitreous

1.1.7 Compressive Strength

0.15 N/mm²178.54 N/mm²

0.15 450

1.1.8 Cleavage

Non-Existent

Perfect

1.1.9 Toughness

Not Available

2.1

1.1.10 Specific Gravity

2.6-2.72.6-2.63

0 8.4

1.1.11 Transparency

Translucent

Translucent to Opaque

1.1.12 Density

2.6 g/cm³2.6-2.65 g/cm³

0 1400

1.2 Thermal Properties

1.2.1 Specific Heat Capacity

0.92 kJ/Kg KNA

0.14 3.2

1.2.2 Resistance

Heat Resistant, Impact Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Obsidian vs Pegmatite Properties

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