Peridotite

Lignite

Peridotite and Lignite

Peridotite

Lignite

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Definition

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

Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat

History

Origin

Pike County, U.S

France

Discoverer

Unknown

Etymology

From French, from peridot +‎ -ite

From French, Latin lignum wood + -ite1

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

Phaneritic

Amorphous, Glassy

Color

Dark Greenish - Grey

Black, Brown, Dark Brown, Grey, Light to Dark Grey

Maintenance

Less

Durability

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones

for Road Aggregate, Steel Production

Medical Industry

Antiquity Uses

Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

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

Electricity Generation

Types

Dunite, Wehrlite, Harzburgite, Lherzolite and Pyrolite

Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite

Features

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

Generally rough to touch, 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

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.

Coal formation takes place due to accumulation of plant debris in a swamp environment. The Coal formation process continues, as peat turns into lignite brown or black coal at increasing heat and pressure.

Composition

Mineral Content

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

Compound Content

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

Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur

Transformation

Metamorphism

✔ ✘

Types of 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

Chemical Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5.5-61

1 7

👆🏻

Grain Size

Coarse Grained

Medium to Fine Coarse Grained

Fracture

Irregular

Conchoidal

Streak

White

Black

Porosity

Less Porous

Highly 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

3.1-3.4 g/cm³800-801 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

1.26 kJ/Kg K1.26 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

Brazil

Brazil, Chile, Colombia, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

New South Wales, Queensland, Victoria

All about Peridotite and Lignite Properties

Know all about Peridotite and Lignite properties here. All properties of rocks are important as they define the type of rock and its application. Peridotite belongs to Igneous Rocks while Lignite belongs to Sedimentary Rocks.Texture of Peridotite is Phaneritic whereas that of Lignite is Amorphous, Glassy. Peridotite appears Rough and Shiny and Lignite appears Veined or Pebbled. The luster of Peridotite is shiny while that of Lignite is dull to vitreous to submetallic. Peridotite is available in dark greenish - grey colors whereas Lignite is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Peridotite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds and that of Lignite are electricity generation.