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Properties of Pumice

Types of Hard Rocks

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Properties of Pumice

Physical Properties of Pumice


Grain Size
Fine Grained


White, Greenish White or Grey

Highly Porous


Compressive Strength
51.20 N/mm2



Specific Gravity


0.25-0.3 g/cm3

Thermal Properties of Pumice

Specific Heat Capacity
0.87 kJ/Kg K

Impact Resistant, Pressure Resistant

Pumice Properties

Pumice properties are essential when it comes to identification of rocks. The study of properties of Pumice rock is done by Mineralogists to determine the identity of rock. Some of the properties of Pumice include: Hardness, Color, Fracture, Luster, Compressive Strength etc. Pumice is Fine Grained. As compared to other rocks, Pumice is more porous and its density is 0.25-0.3 g/cm3. Get to know more about physical properties of Pumice and thermal properties of Pumice.

Physical Properties of Pumice

Physical properties of rocks are used to identify the type of rocks and to discover more about them. There are various physical properties of Pumice like Hardness, Grain Size, Fracture, Streak, Porosity, Luster, Strength etc which defines it. The physical properties of Pumice rock are vital in determining its Pumice Texture and Pumice Uses.

Hardness and Strength of Pumice

The physical properties of Pumice depend on its formation. Physical properties of rocks play an important role in determining its applications in various fields. Rocks are rated on the on the Moh's Hardness Scale which rates the rocks on the scale from 1 to 10. Rocks with hardness 1-3 are soft rocks from 3-6 are medium hardness rocks and 6-10 are hard rocks. The hardness of Pumice is 6 whereas its compressive strength is 51.20 N/mm2. Streak is the color of rock when it is crushed or powdered. The streak of Pumice is white, greenish white or grey whereas its fracture is planar. Luster of Pumice is the interaction of light with the surface of Pumice. Luster of Pumice is earthy. Pumice cleavage is perfect. The specific gravity of Pumice is 2.86. Pumice is opaque in nature whereas its toughness is 3. You can also know all the list of rocks in Opaque Rocks, Translucent Rocks and Transparent Rocks.

Thermal properties of Pumice

Check out more about What Is Pumice and its thermal properties. Thermal properties of Pumice play an important role in geology. Specific heat capacity, resistance offered by the rock to heat, water, pressure etc. are some of the thermal properties of Pumice.

Specific Heat Capacity of Pumice

Specific heat capacity is defined as the heat capacity per unit mass of rock. Specific heat capacity or specific heat is one of the important properties of Pumice. The specific heat capacity of Pumice is 0.87 kJ/Kg K. Properties of Pumice also include resistance of Pumice to heat, water, pressure, impact etc. It helps in determining the parameters to which Pumice offers resistance. If we talk about Pumice resistance, Pumice is impact resistant, pressure resistant.