Properties of Obsidian and Pumice

Obsidian

Pumice

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1 Properties

1.1 Physical Properties

1.1.1 Hardness

5-5.56

1 7

1.1.2 Grain Size

Not Applicable

Fine Grained

1.1.3 Fracture

Conchoidal

Planar

1.1.4 Streak

White

White, Greenish White or Grey

1.1.5 Porosity

Very Less Porous

Highly Porous

1.1.6 Luster

Vitreous

Earthy

1.1.7 Compressive Strength

0.15 N/mm²51.20 N/mm²

0.15 450

1.1.8 Cleavage

Non-Existent

Perfect

1.1.9 Toughness

Not Available

1.1.10 Specific Gravity

2.6-2.72.86

0 8.4

1.1.11 Transparency

Translucent

Opaque

1.1.12 Density

2.6 g/cm³0.25-0.3 g/cm³

0 1400

1.2 Thermal Properties

1.2.1 Specific Heat Capacity

0.92 kJ/Kg K0.87 kJ/Kg K

0.14 3.2

1.2.2 Resistance

Heat Resistant, Impact Resistant

Impact Resistant, Pressure Resistant

Obsidian vs Pumice Properties

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