Properties of Pumice and Obsidian

Pumice

Obsidian

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1 Properties

1.1 Physical Properties

1.1.1 Hardness

65-5.5

1 7

1.1.2 Grain Size

Fine Grained

Not Applicable

1.1.3 Fracture

Planar

Conchoidal

1.1.4 Streak

White, Greenish White or Grey

White

1.1.5 Porosity

Highly Porous

Very Less Porous

1.1.6 Luster

Earthy

Vitreous

1.1.7 Compressive Strength

51.20 N/mm²0.15 N/mm²

0.15 450

1.1.8 Cleavage

Perfect

Non-Existent

1.1.9 Toughness

Not Available

1.1.10 Specific Gravity

2.862.6-2.7

0 8.4

1.1.11 Transparency

Opaque

Translucent

1.1.12 Density

0.25-0.3 g/cm³2.6 g/cm³

0 1400

1.2 Thermal Properties

1.2.1 Specific Heat Capacity

0.87 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

1.2.2 Resistance

Impact Resistant, Pressure Resistant

Heat Resistant, Impact Resistant

Pumice vs Obsidian Properties

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