Properties of Slate and Obsidian

Slate

Obsidian

Properties of Obsidian and Slate

Properties

Physical Properties

Hardness

3-4

5-5.5

Grain Size

Very fine-grained

Not Applicable

Fracture

Splintery

Conchoidal

Streak

Light to dark brown

White

Porosity

Less Porous

Very Less Porous

Luster

Dull

Vitreous

Compressive Strength

30.00 N/mm²

0.15 N/mm²

Cleavage

Slaty

Non-Existent

Toughness

1.2

Not Available

Specific Gravity

2.65-2.8

2.6-2.7

Transparency

Opaque

Translucent

Density

2.6-2.8 g/cm³

2.6 g/cm³

Thermal Properties

Specific Heat Capacity

0.76 kJ/Kg K

0.92 kJ/Kg K

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

Reserves >>

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Slate vs Obsidian Properties

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