Eclogite

Anthracite

Eclogite and Anthracite

Eclogite

Anthracite

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Definition

Eclogite is an extreme metamorphic rock, formed by regional metamorphism of basalt rock under very high pressure and temperature

Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster

History

Origin

Pennsylvania, U.S.

Discoverer

René Just Haüy

Unknown

Etymology

From French, Greek eklogē selection with reference to the selective content of the rock + -ite1

From Greek anthrakites, from anthrax, anthrak meaning coal

Class

Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

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

Texture

Earthy

Amorphous, Glassy

Color

Black, Brown, Green, Grey, Pink, White

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

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Banded and Foilated

Veined or Pebbled

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Exterior Uses

Paving Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

Cement Manufacture, for Road Aggregate, Making natural cement, Steel Production

Medical Industry

In Chemical and Pharmaceutical Industry, Medicines and Cosmetics

In Chemical and Pharmaceutical Industry, Manufacture of Aspirins

Antiquity Uses

Artifacts

Other Uses

Commercial Uses

Creating Artwork, Gemstone

Alumina Refineries, Electricity Generation, Liquid Fuel, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Paper Industry

Types

Eclogite

Semi-anthracite and Meta-anthracite

Features

Available in Lots of Colors and Patterns, Generally rough to touch, 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

Formation

Eclogite forms from high-pressure metamorphism of mafic igneous rocks mainly, basalt or gabbro as it plunges into the mantle in a subduction zone.

Anthracite forms from the accumulation of plant debris in a swamp environment. When plant debris dies and falls into the swamp, the standing water of the swamp protects it from decay.

Composition

Mineral Content

Amphibole, Coesite, Corundum, Dolomite, Garnet, Kyanite, Lawsonite, Paragonite, Phengite, Pyroxene, Quartz, Rutile, Zoisite

Calcite, Clay, Clay Minerals

Compound Content

Aluminium Oxide, NaCl, CaO, Carbon Dioxide, Iron(III) Oxide, Magnesium Carbonate, MgO, Sodium Oxide, Potassium, Sodium

Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion

Properties

Physical Properties

Hardness

3.5-41-1.5

1 7

👆🏻

Grain Size

Fine Grained

Medium to Fine Coarse Grained

Fracture

Conchoidal

Streak

White

Black

Porosity

Less Porous

Luster

Subvitreous to Dull

Shiny

Compressive Strength

200.00 N/mm²-

0.15 450

👆🏻

Cleavage

Perfect

Toughness

Specific Gravity

2.86-2.871.1-1.4

0 8.4

👆🏻

Transparency

Opaque

Density

3.2-3.6 g/cm³1.25-2.5 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.75 kJ/Kg K1.32 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant

Heat Resistant, Water Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Kazakhstan, Kuwait, Russia, South Korea, Thailand, Turkey

Bangladesh, Burma, Cambodia, China, India, Indonesia, Kazakhstan, Malaysia, Mongolia, Pakistan, Turkey, Vietnam

Africa

Ethiopia, Morocco, South Africa

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

Europe

France, Germany, Italy, Norway, Scotland

Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom

Others

Greenland

Deposits in Western Continents

North America

Canada, Costa Rica, Panama, USA

Canada, Mexico, USA

South America

Argentina, Brazil, Colombia, Ecuador

Brazil, Chile, Colombia, Venezuela

Deposits in Oceania Continent

Australia

Central Australia, New Zealand, Queensland

New South Wales, Queensland, Victoria

All about Eclogite and Anthracite Properties

Know all about Eclogite and Anthracite properties here. All properties of rocks are important as they define the type of rock and its application. Eclogite and Anthracite belong to Metamorphic Rocks.Texture of Eclogite is Earthy whereas that of Anthracite is Amorphous, Glassy. Eclogite appears Dull, Banded and Foilated and Anthracite appears Veined or Pebbled. The luster of Eclogite is subvitreous to dull while that of Anthracite is shiny. Eclogite is available in black, brown, green, grey, pink, white colors whereas Anthracite is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Eclogite are creating artwork, gemstone and that of Anthracite are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry.