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Essexite 
Essexite 

Dunite
Dunite



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Essexite 
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Essexite  vs Dunite

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Definition

Definition

Essexite which is also known as nepheline monzogabbro, is a dark gray or black holocrystalline plutonic Iigneous Rock
Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine

History

Origin

USA
New Zealand

Discoverer

Unknown
Ferdinand von Hochstetter

Etymology

From the locality in Essex County, Massachusetts,US
From the name of Dun Mountain, New Zealand, + -ite1

Class

Igneous Rocks
Igneous Rocks

Sub-Class

Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock

Family

Group

Plutonic
Plutonic

Other Categories

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

Texture

Texture

Granular
Phaneritic

Color

Dark Grey to Black
Dark Greenish - Grey

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Banded
Rough and Shiny

Uses

Architecture

Interior Uses

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

Exterior Uses

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

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar

Medical Industry

-
-

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines
Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Jewelry, Sea Defence, Tombstones
Creating Artwork, Gemstone, Jewelry, Source of Chromite, Platinum, Nickel and Garnet, Source of Diamonds

Types

Types

Intermediate volcanic rock
Dunite

Features

Is one of the oldest rock, Smooth to touch
Constitutes upper part of the Earth's mantle, Generally rough to touch, Host rock for Diamond, Is one of the oldest rock

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Essexite is a type of igneous rock, which is usually dark grey to black plutonic rock. For the formation of essexite, suitable magma with exact composition of K, Ba, Rb, Cs, Sr should be produced.
Dunite is a plutonic ultramafic igneous rock consisting almost m olivine. It can be formed in two ways.

Composition

Mineral Content

Augite, Feldspar, Hornblende, Nepheline, Olivine, Plagioclase, Pyroxene
Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene

Compound Content

Aluminium Oxide, Ba, Ca, Cs, Potassium, Rb, Sodium, Sr
Ca, CaO, Fe, Potassium, Silicon Dioxide, Sodium, Titanium Dioxide

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

Types of Weathering

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

Erosion

Types of Erosion

Coastal Erosion, Glacier Erosion, Water Erosion
Coastal Erosion, Glacier Erosion, Water Erosion

Properties

Physical Properties

Hardness

73.5-4
1 7
👆🏻

Grain Size

Fine Grained
Coarse Grained

Fracture

Conchoidal
Irregular

Streak

Black
White

Porosity

Highly Porous
Less Porous

Luster

-
Shiny

Compressive Strength

120.00 N/mm2107.55 N/mm2
0.15 450
👆🏻

Cleavage

-
-

Toughness

1.6
2.1

Specific Gravity

-99993-3.01
0 8.4
👆🏻

Transparency

Opaque
Translucent to Opaque

Density

-9999 g/cm32.84-2.85 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K1.25 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia
China, India, Indonesia, Kazakhstan, Russia, South Korea, Thailand, Turkey

Africa

South Africa
Morocco, South Africa

Europe

Germany, Greece, Italy, Scotland, Turkey
Finland, France, Georgia, Germany, Great Britain, Italy, Kazakhstan, Netherlands, Norway, Spain, Switzerland

Others

Greenland
-

Deposits in Western Continents

North America

Canada, USA
Canada, USA

South America

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

Deposits in Oceania Continent

Australia

New Zealand, Queensland
New Zealand, Western Australia

Essexite  vs Dunite 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 Essexite  and Dunite Reserves. Essexite which is also known as nepheline monzogabbro, is a dark gray or black holocrystalline plutonic Iigneous Rock. Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine. 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 Essexite  vs Dunite information and Essexite  vs Dunite characteristics in the upcoming sections.

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

More about Essexite  and Dunite

Here you can know more about Essexite  and Dunite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Essexite  and Dunite consists of mineral content and compound content. The mineral content of Essexite  includes Augite, Feldspar, Hornblende, Nepheline, Olivine, Plagioclase, Pyroxene and mineral content of Dunite includes Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene. You can also check out the list of all Igneous Rocks. When we have to compare Essexite  vs Dunite, the texture, color and appearance plays an important role in determining the type of rock. Essexite  is available in dark grey to black colors whereas, Dunite is available in dark greenish - grey colors. Appearance of Essexite  is Banded and that of Dunite is Rough and Shiny. Properties of rock is another aspect for Essexite  vs Dunite. The hardness of Essexite  is 7 and that of Dunite is 3.5-4. The types of Essexite  are Intermediate volcanic rock whereas types of Dunite are Dunite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Essexite  is black while that of Dunite is white. The specific heat capacity of Essexite  is 0.79 kJ/Kg K and that of Dunite is 1.25 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Essexite  is impact resistant, pressure resistant, wear resistant whereas Dunite is heat resistant, pressure resistant, wear resistant.