Gabbro

Icelandite

Gabbro and Icelandite

Gabbro

Icelandite

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Definition

Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt

Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock

History

Origin

Germany

Iceland

Discoverer

Christian Leopold von Buch

Ian S. E. Carmichael

Etymology

From Latin glaber bare, smooth, bald

From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Plutonic

Volcanic

Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Phaneritic

Aphanitic to Porphyritic

Color

Dark Grey to Black

Bluish - Grey, Grey, Pink, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Veined and Shiny

Dull and Soft

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Homes, Interior Decoration

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens

Exterior Uses

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

Office Buildings, Roof Tiles

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate

Cobblestones, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Jewellery, Sculpture, Small Figurines

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones

Cemetery Markers, Creating Artwork

Types

Anorthosite Gabbro and Norite Gabbro

Intermediate volcanic rock

Features

Smooth to touch

Generally rough to touch, High silica content, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Gabbro, a mafic rock, forms due to cooling and crystallization of magma underneath Earth's surface.

Icelandite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

Composition

Mineral Content

Augite, Olivine, Plagioclase, Pyroxene

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon

Compound Content

Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide

Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Impact Metamorphism

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

Weathering

✔ ✘

Types of Weathering

Chemical Weathering

Biological Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion

Chemical Erosion, Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

1 7

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Grain Size

Coarse Grained

Very fine-grained

Fracture

Conchoidal

Uneven

Streak

Black

White

Porosity

Highly Porous

Less Porous

Luster

Vitreous

Compressive Strength

225.00 N/mm²200.00 N/mm²

0.15 450

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Cleavage

Toughness

1.6

1.1

Specific Gravity

2.86-2.872.5-2.8

0 8.4

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Transparency

Opaque

Density

2.7-3.3 g/cm³2.11-2.36 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.71 kJ/Kg K2.39 kJ/Kg K

0.14 3.2

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Resistance

Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

India, Indonesia, Japan, Nepal, South Korea

Africa

South Africa

Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania

Europe

Germany, Greece, Italy, Scotland, Turkey

Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom

Others

Greenland

Deposits in Western Continents

North America

Canada, USA

Mexico, USA

South America

Brazil, Colombia, Venezuela

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, Queensland

New South Wales, New Zealand, Western Australia

All about Gabbro and Icelandite Properties

Know all about Gabbro and Icelandite properties here. All properties of rocks are important as they define the type of rock and its application. Gabbro and Icelandite belong to Igneous Rocks.Texture of Gabbro is Phaneritic whereas that of Icelandite is Aphanitic to Porphyritic. Gabbro appears Veined and Shiny and Icelandite appears Dull and Soft. The luster of Gabbro is while that of Icelandite is vitreous. Gabbro is available in dark grey to black colors whereas Icelandite is available in bluish - grey, grey, pink, yellow colors. The commercial uses of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Icelandite are cemetery markers, creating artwork.