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Pumice Rock

Types of Hard Rocks

Novaculite
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Granite
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Basalt
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Pumice Definition

Definition
Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals

History of Pumice

Origin
Spain
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Discoverer
Unknown

Etymology
From Old French pomis, from a Latin dialect variant of pumex

Class
Igneous Rocks
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Sub-Class
Durable Rock, Medium Hardness Rock
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Pumice Family

Group
Volcanic

Other Categories
Fine Grained Rock, Opaque Rock

Pumice Texture

Texture
Vesicular
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Pumice Color
Beige, Colourless, Grey, Light Green, Light Grey, Pink, White, Yellow- grey

Maintenance
Less
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Durability
Durable

Water Resistant
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Scratch Resistant
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Stain Resistant
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Wind Resistant
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Acid Resistant
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Appearance
Vesicular
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Pumice Uses

Architecture

Interior Uses
Decorative Aggregates, Flooring, Homes, Interior Decoration
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Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
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Other Architectural Uses
Curbing, Powder

Industry

Construction Industry
As Dimension Stone, Cement Manufacture, for Road Aggregate, In landscaping and horticulture, Making natural cement, Production of lightweight concrete blocks

Medical Industry
As an abrasive in skin exfoliating products, In Chemical and Pharmaceutical Industry, Medicines and Cosmetics

Antiquity Uses
Artifacts
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Other Uses

Commercial Uses
As a traction material on snow-covered roads, As an abrasive in pencil erasers, Fine abrasive used for polishing, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Used in aquariums
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Pumice Types

Types
Scoria

Features
Host Rock for Lead
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Archaeological Significance of Pumice

Monuments
Not Yet Used

Famous Monuments
Not Applicable

Sculpture
Not Yet Used

Famous Sculptures
Not Applicable

Pictographs
Used

Petroglyphs
Used

Figurines
Not Yet Used

Fossils
Absent

Formation of Pumice

Formation
Pumice rock forms when the magma cools so quickly that atoms in the melt are not able to arrange themselves into a crystalline structure.

Composition

Mineral Content
Aluminum Oxides, Calcite, Carbonate, Iron Oxides, Silica
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Compound Content
Al, Aluminium Oxide, CaO, Carbon Dioxide, MgO, Silicon Dioxide
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Transformation

Metamorphism

Types of Metamorphism
Burial Metamorphism, Impact Metamorphism

Weathering

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties of Pumice

Physical Properties of Pumice

Hardness
6

Grain Size
Fine Grained
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Fracture
Planar
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Streak
White, Greenish White or Grey
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Porosity
Highly Porous
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Luster
Earthy
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Compressive Strength
51.20 N/mm2
27
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Cleavage
Perfect
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Toughness
3

Specific Gravity
2.86

Transparency
Opaque
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Density
0.25-0.3 g/cm3

Thermal Properties of Pumice

Specific Heat Capacity
0.87 kJ/Kg K
14
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Resistance
Impact Resistant, Pressure Resistant
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Pumice Reserves

Pumice Deposits in Eastern Continents

Asia
Afghanistan, Indonesia, Japan, Russia

Africa
Ethiopia, Kenya, Tanzania

Europe
Greece, Hungary, Iceland, Italy, Turkey

Others
Not Yet Found

Pumice Deposits in Western Continents

North America
Bahamas, Barbados, Canada, Costa Rica, Cuba, Jamaica, Mexico, USA

South America
Argentina, Chile, Ecuador, Peru

Pumice Deposits in Oceania Continent

Australia
New Zealand, Western Australia

Information about Pumice

Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Pumice Uses. We have provided you with all information about Pumice rock here. Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. Pumice is available in beige, colourless, grey, light green, light grey, pink, white, yellow- grey colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Pumice is white, greenish white or grey. Get to know more about Pumice rock and characteristics of Pumice rock in the next sections.

Characteristics of Pumice

Many rocks have distinct characteristics. Some of the Properties of Pumice are hardness, structure, streak, fracture etc. Pumice is significant as it is composed of minerals and has variety of uses in our day to day life. The characteristics of Pumice plays an important role in its identification. The hardness of Pumice is 6 on Moh’s hardness scale. Rocks according to their hardness are divided into:Hard Rocks, Soft Rocks and Rocks with Medium Hardness. Fracture of Pumice rock is planar. Its specific heat capacity is 0.87 kJ/Kg K. Pumice is impact resistant, pressure resistant. Some of its uses are:

  • Interior Uses: Decorative aggregates, Flooring, Homes and Interior decoration.
  • Construction Industry: As dimension stone, Cement manufacture, For road aggregate, In landscaping and horticulture, Making natural cement, Production of lightweight concrete blocks.

Know more about Pumice rock in the next section.

More About Pumice

Pumice is a type of Igneous Rocks. The color of rock is one of its important property. Pumice rock is available in beige, colourless, grey, light green, light grey, pink, white, yellow- grey colors. It is Vesicular in appearance. The Pumice mineral content includes Aluminum Oxides, Calcite, Carbonate, Iron Oxides, Silica. Its compound content includes Al, Aluminium Oxide, CaO, Carbon Dioxide, MgO, Silicon Dioxide. Let’s move on to the types of Pumice. The types of Pumice include Scoria. Fossils are the remains of prehistoric plants or animals which are embedded in rock and preserved in petrified form. Fossils are found only in sedimentary rocks. As Pumice belongs to Igneous Rocks, fossils are not found in it.