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Dunite
Dunite

Coal
Coal



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Dunite vs Coal

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Definition

Definition

Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds

History

Origin

New Zealand
USA

Discoverer

Ferdinand von Hochstetter
John Peter Salley

Etymology

From the name of Dun Mountain, New Zealand, + -ite1
From the Old English term col, which has meant mineral of fossilized carbon since the 13th century

Class

Igneous Rocks
Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock

Family

Group

Plutonic
-

Other Categories

Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Texture

Phaneritic
Amorphous, Glassy

Color

Dark Greenish - Grey
Black, Brown, Dark Brown, Grey, Light to Dark Grey

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Rough and Shiny
Veined or Pebbled

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration
-

Exterior Uses

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

Other Architectural Uses

Curbing
-

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar
Cement Manufacture, for Road Aggregate, Making natural cement, Steel Production

Medical Industry

-
-

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines
Artifacts

Other Uses

Commercial Uses

Creating Artwork, Gemstone, Jewelry, Source of Chromite, Platinum, Nickel and Garnet, Source of Diamonds
Alumina Refineries, Electricity Generation, Liquid Fuel, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Paper Industry

Types

Types

Dunite
Peat, Lignite, Sub-Bituminous Coal, Bituminous Coal, Anthracite, Graphite

Features

Constitutes upper part of the Earth's mantle, Generally rough to touch, Host rock for Diamond, Is one of the oldest rock
Helps in production of Heat and Electricity, Used as fossil fuel

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Present

Formation

Formation

Dunite is a plutonic ultramafic igneous rock consisting almost m olivine. It can be formed in two ways.
Coal forms from the accumulation of plant debris in a swamp environment which is buried by sediments such as mud or sand and then compacted to form coal.

Composition

Mineral Content

Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene
Analcime, Apatite, Barite, Calcite, Chalcopyrite, Chlorite, Chromite, Clausthalite, Clay Minerals, Crandallite Group, Dolomite, Feldspar, Galena, Gypsum, Marcasite, Muscovite or Illite, Pyrite, Quartz, Siderite, Sphalerite, Zircon

Compound Content

Ca, CaO, Fe, Potassium, Silicon Dioxide, Sodium, Titanium Dioxide
Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism

Weathering

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering
-

Erosion

Types of Erosion

Coastal Erosion, Glacier Erosion, Water Erosion
-

Properties

Physical Properties

Hardness

3.5-41-1.5
1 7
👆🏻

Grain Size

Coarse Grained
Medium to Fine Coarse Grained

Fracture

Irregular
Conchoidal

Streak

White
Black

Porosity

Less Porous
Less Porous

Luster

Shiny
Dull to Vitreous to Submetallic

Compressive Strength

107.55 N/mm2-
0.15 450
👆🏻

Cleavage

-
-

Toughness

2.1
-

Specific Gravity

3-3.011.1-1.4
0 8.4
👆🏻

Transparency

Translucent to Opaque
Opaque

Density

2.84-2.85 g/cm31100-1400 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

1.25 kJ/Kg K1.32 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant
Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Indonesia, Kazakhstan, Russia, South Korea, Thailand, Turkey
Bangladesh, Burma, Cambodia, China, India, Indonesia, Kazakhstan, Malaysia, Mongolia, Pakistan, Turkey, Vietnam

Africa

Morocco, South Africa
Botswana, Kenya, Morocco, Mozambique, South Africa, Tanzania

Europe

Finland, France, Georgia, Germany, Great Britain, Italy, Kazakhstan, Netherlands, Norway, Spain, Switzerland
Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom

Others

-
-

Deposits in Western Continents

North America

Canada, USA
Canada, Mexico, USA

South America

Argentina, Brazil, Colombia, Ecuador, Venezuela
Brazil, Chile, Colombia, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, Western Australia
New South Wales, Queensland, Victoria

Dunite vs Coal 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 Dunite and Coal Reserves. Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine. Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. 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 Dunite vs Coal information and Dunite vs Coal characteristics in the upcoming sections.

Dunite vs Coal 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. Dunite vs Coal characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Dunite and Properties of Coal. Learn more about Dunite vs Coal in the next section. The interior uses of Dunite include Decorative aggregates and Interior decoration whereas the interior uses of Coal include . Due to some exceptional properties of Dunite and Coal, they have various applications in construction industry. The uses of Dunite in construction industry include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate, Making natural cement, Raw material for the manufacture of mortar and that of Coal include Cement manufacture, For road aggregate, Making natural cement, Steel production.

More about Dunite and Coal

Here you can know more about Dunite and Coal. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Dunite and Coal consists of mineral content and compound content. The mineral content of Dunite includes Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene and mineral content of Coal includes Analcime, Apatite, Barite, Calcite, Chalcopyrite, Chlorite, Chromite, Clausthalite, Clay Minerals, Crandallite Group, Dolomite, Feldspar, Galena, Gypsum, Marcasite, Muscovite or Illite, Pyrite, Quartz, Siderite, Sphalerite, Zircon. You can also check out the list of all Igneous Rocks. When we have to compare Dunite vs Coal, the texture, color and appearance plays an important role in determining the type of rock. Dunite is available in dark greenish - grey colors whereas, Coal is available in black, brown, dark brown, grey, light to dark grey colors. Appearance of Dunite is Rough and Shiny and that of Coal is Veined or Pebbled. Properties of rock is another aspect for Dunite vs Coal. The hardness of Dunite is 3.5-4 and that of Coal is 1-1.5. The types of Dunite are Dunite whereas types of Coal are Peat, Lignite, Sub-Bituminous Coal, Bituminous Coal, Anthracite, Graphite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Dunite is white while that of Coal is black. The specific heat capacity of Dunite is 1.25 kJ/Kg K and that of Coal is 1.32 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Dunite is heat resistant, pressure resistant, wear resistant whereas Coal is heat resistant.