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Chalk
Chalk

Pumice
Pumice



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Chalk vs Pumice

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Definition

Definition

Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers
Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals

History

Origin

-
Spain

Discoverer

Unknown
Unknown

Etymology

From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone
From Old French pomis, from a Latin dialect variant of pumex

Class

Sedimentary Rocks
Igneous Rocks

Sub-Class

Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock

Family

Group

-
Volcanic

Other Categories

Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock

Texture

Texture

Clastic or Non-Clastic
Vesicular

Color

Grey, White, Yellow
Beige, Grey, Light Green, Light Grey, Pink, White, Yellow- grey

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Soft
Vesicular

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration
Decorative Aggregates, Flooring, Homes, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Paving Stone, Garden Decoration
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Powder
Curbing, Powder

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, raw material for manufacture of quicklime and slaked lime, Source of calcium
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, Monuments, Sculpture, Small Figurines
Artifacts

Other Uses

Commercial Uses

Alumina Refineries, Creating Artwork, Drawing on blackboards, Gymnasts, athletes and mountain climbers use for grip, In aquifers, Paper Industry, Production of Lime, Raw material for manufacture of quicklime, slaked lime, Soil Conditioner, Whiting, Whiting material in toothpaste, paint and paper
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

Types

Types

Chalk Marl and Marl
Scoria

Features

Clasts are smooth to touch, Is one of the oldest rock, Smooth to touch, Very fine grained rock
Host Rock for Lead

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Present
Absent

Formation

Formation

Chalk is formed from lime mud, which accumulates on the sea floor which is then transformed into rock by geological processes.
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

Calcite, Clay, Clay Minerals, Quartz, Sand
Aluminum Oxides, Calcite, Carbonate, Iron Oxides, Silica

Compound Content

Ca, NaCl, CaO
Al, Aluminium Oxide, CaO, Carbon Dioxide, MgO, Silicon Dioxide

Transformation

Metamorphism

Types of Metamorphism

-
Burial Metamorphism, Impact Metamorphism

Weathering

Types of Weathering

Biological Weathering, Chemical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

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

Properties

Physical Properties

Hardness

16
1 7
👆🏻

Grain Size

Very fine-grained
Fine Grained

Fracture

-
Planar

Streak

White
White, Greenish White or Grey

Porosity

Highly Porous
Highly Porous

Luster

Dull
Earthy

Compressive Strength

5.00 N/mm251.20 N/mm2
0.15 450
👆🏻

Cleavage

-
Perfect

Toughness

1
3

Specific Gravity

2.3-2.42.86
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

2.49-2.50 g/cm30.25-0.3 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.90 kJ/Kg K0.87 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant
Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

Brunei, India, Indonesia, Malaysia, Singapore, Thailand, Vietnam
Afghanistan, Indonesia, Japan, Russia

Africa

Cameroon, Chad, Ghana, Kenya, Malawi, Sudan, Tanzania, Togo, Zambia, Zimbabwe
Ethiopia, Kenya, Tanzania

Europe

England, France, Germany, Spain, United Kingdom
Greece, Hungary, Iceland, Italy, Turkey

Others

-
-

Deposits in Western Continents

North America

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

South America

Colombia
Argentina, Chile, Ecuador, Peru

Deposits in Oceania Continent

Australia

Adelaide, New Zealand, Queensland, Victoria, Yorke Peninsula
New Zealand, Western Australia

Chalk vs Pumice Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Chalk and Pumice Reserves. Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Chalk vs Pumice information and Chalk vs Pumice characteristics in the upcoming sections.

Chalk vs Pumice Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Chalk vs Pumice characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Chalk and Properties of Pumice. Learn more about Chalk vs Pumice in the next section. The interior uses of Chalk include Decorative aggregates, Homes and Interior decoration whereas the interior uses of Pumice include Decorative aggregates, Flooring, Homes and Interior decoration. Due to some exceptional properties of Chalk and Pumice, they have various applications in construction industry. The uses of Chalk in construction industry include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate, Making natural cement, Raw material for manufacture of quicklime and slaked lime, Source of calcium and that of Pumice include As dimension stone, Cement manufacture, For road aggregate, In landscaping and horticulture, Making natural cement, Production of lightweight concrete blocks.

More about Chalk and Pumice

Here you can know more about Chalk and Pumice. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Chalk and Pumice consists of mineral content and compound content. The mineral content of Chalk includes Calcite, Clay, Clay Minerals, Quartz, Sand and mineral content of Pumice includes Aluminum Oxides, Calcite, Carbonate, Iron Oxides, Silica. You can also check out the list of all Sedimentary Rocks. When we have to compare Chalk vs Pumice, the texture, color and appearance plays an important role in determining the type of rock. Chalk is available in grey, white, yellow colors whereas, Pumice is available in beige, grey, light green, light grey, pink, white, yellow- grey colors. Appearance of Chalk is Soft and that of Pumice is Vesicular. Properties of rock is another aspect for Chalk vs Pumice. The hardness of Chalk is 1 and that of Pumice is 6. The types of Chalk are Chalk Marl and Marl whereas types of Pumice are Scoria. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Chalk is white while that of Pumice is white, greenish white or grey. The specific heat capacity of Chalk is 0.90 kJ/Kg K and that of Pumice is 0.87 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Chalk is heat resistant whereas Pumice is impact resistant, pressure resistant.