Eclogite

Porphyry

Eclogite and Porphyry

Eclogite

Porphyry

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Definition

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

Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix

History

Origin

Egypt

Discoverer

René Just Haüy

Unknown

Etymology

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

From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites

Class

Metamorphic Rocks

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Earthy

Porphyritic

Color

Black, Brown, Green, Grey, Pink, White

Black, Brown, Green, Grey, Red, Rust, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Banded and Foilated

Dull

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Exterior Uses

Paving Stone, Garden Decoration

Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

Construction Aggregate

Medical Industry

In Chemical and Pharmaceutical Industry, Medicines and Cosmetics

Antiquity Uses

Artifacts

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Creating Artwork, Gemstone

Creating Artwork, Gemstone, Jewelry

Types

Eclogite

Rhomb Porphyry

Features

Available in Lots of Colors and Patterns, Generally rough to touch, Is one of the oldest rock

Generally rough to touch, Is one of the oldest rock, Surfaces are often shiny

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.

Porphyry is formed in two stages: the magma cools slowly deep within the crust or the magma is cools rapidly as it erupts from a volcano, creating small grains that are usually invisible to naked eye.

Composition

Mineral Content

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

Biotite, Chert, Feldspar, Garnet, Graphite, Quartz, Silica

Compound Content

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

Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Titanium Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

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

Weathering

✔ ✘

Types of Weathering

Mechanical Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties

Physical Properties

Hardness

3.5-46-7

1 7

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Grain Size

Fine Grained

Fracture

Irregular

Streak

White

Porosity

Less Porous

Luster

Subvitreous to Dull

Dull

Compressive Strength

200.00 N/mm²150.00 N/mm²

0.15 450

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Cleavage

Perfect

Toughness

1.7

Specific Gravity

2.86-2.872.5-4

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

3.2-3.6 g/cm³2.5-2.52 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.75 kJ/Kg K0.71 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

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

China, Kazakhstan, South Korea, Thailand, Turkey, Vietnam

Africa

Ethiopia, Morocco, South Africa

Egypt, Ethiopia, Ghana, South Africa

Europe

France, Germany, Italy, Norway, Scotland

Finland, France, Germany, Great Britain, Hungary, Iceland, Ireland, Italy, Netherlands, Norway, Romania, Sweden, Switzerland

Others

Greenland

Deposits in Western Continents

North America

Canada, Costa Rica, Panama, USA

Canada, Cuba, Jamaica, USA

South America

Argentina, Brazil, Colombia, Ecuador

Bolivia, Brazil, Colombia, Ecuador, Paraguay

Deposits in Oceania Continent

Australia

Central Australia, New Zealand, Queensland

New South Wales, New Zealand, Western Australia

All about Eclogite and Porphyry Properties

Know all about Eclogite and Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Eclogite belongs to Metamorphic Rocks while Porphyry belongs to Igneous Rocks.Texture of Eclogite is Earthy whereas that of Porphyry is Porphyritic. Eclogite appears Dull, Banded and Foilated and Porphyry appears Dull. The luster of Eclogite is subvitreous to dull while that of Porphyry is dull. Eclogite is available in black, brown, green, grey, pink, white colors whereas Porphyry is available in black, brown, green, grey, red, rust, white colors. The commercial uses of Eclogite are creating artwork, gemstone and that of Porphyry are creating artwork, gemstone, jewelry.