Dunite

Peridotite

Dunite and Peridotite

Dunite

Peridotite

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Definition

Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine

Peridotite is a dense, coarse-grained plutonic is the main constituent of the earth's mantle

History

Origin

New Zealand

Pike County, U.S

Discoverer

Ferdinand von Hochstetter

Unknown

Etymology

From the name of Dun Mountain, New Zealand, + -ite1

From French, from peridot +‎ -ite

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Other Categories

Coarse Grained Rock, Opaque Rock

Texture

Phaneritic

Color

Dark Greenish - Grey

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Rough and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Exterior Uses

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

As Building Stone, As Facing Stone, Garden Decoration

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

As Dimension Stone, Cobblestones

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Creating Artwork, Gemstone, Jewelry, Source of Chromite, Platinum, Nickel and Garnet, Source of Diamonds

Types

Dunite

Dunite, Wehrlite, Harzburgite, Lherzolite and Pyrolite

Features

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

Formation

Dunite is a plutonic ultramafic igneous rock consisting almost m olivine. It can be formed in two ways.

Peridotites can be formed in two ways: as mantle rocks formed during the accretion and differentiation of the Earth or as cumulate rocks formed by precipitation of olivine and pyroxenes from basaltic magmas.

Composition

Mineral Content

Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene

Compound Content

Ca, CaO, Fe, Potassium, Silicon Dioxide, Sodium, Titanium Dioxide

Ca, Fe, Mg, Potassium, Silicon Dioxide, Sodium, Titanium Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

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

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion, Glacier Erosion, Water Erosion

Chemical Erosion

Properties

Physical Properties

Hardness

3.5-45.5-6

1 7

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Grain Size

Coarse Grained

Fracture

Irregular

Streak

White

Porosity

Less Porous

Luster

Shiny

Compressive Strength

107.55 N/mm²107.55 N/mm²

0.15 450

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Cleavage

Toughness

2.1

Specific Gravity

3-3.013-3.01

0 8.4

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Transparency

Translucent to Opaque

Density

2.84-2.85 g/cm³3.1-3.4 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

1.25 kJ/Kg K1.26 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

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

Africa

Morocco, South Africa

Europe

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

Others

Deposits in Western Continents

North America

Canada, USA

South America

Argentina, Brazil, Colombia, Ecuador, Venezuela

Brazil

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

All about Dunite and Peridotite Properties

Know all about Dunite and Peridotite properties here. All properties of rocks are important as they define the type of rock and its application. Dunite and Peridotite belong to Igneous Rocks.Texture of Dunite is Phaneritic whereas that of Peridotite is Phaneritic. Dunite appears Rough and Shiny and Peridotite appears Rough and Shiny. The luster of Dunite and Peridotite is shiny. Dunite and Peridotite are available in dark greenish - grey colors. The commercial uses of Dunite and Peridotite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.