Norite

Nephelinite

Norite and Nephelinite

Norite

Nephelinite

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Definition

Norite is a mafic intrusive igneous rock composed largely of the calcium-rich plagioclase labradorite, orthopyroxene, and olivine

Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).

History

Origin

Norway

Brazil

Discoverer

Unknown

Etymology

From the Norwegian name for Norway, Norge

from French néphéline, from Greek nephelē

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Plutonic

Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Phaneritic

Aphanitic

Color

Dark Grey to Black

Black, Brown, Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Veined and Shiny

Skeletal

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Interior Decoration

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

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

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

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

Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)

Types

Ultramafic intrusive rock

Peralkaline Nephelinite

Features

Smooth to touch

Host Rock for Lead

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Norite 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.

Nephelinite 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

Clinopyroxene, Nepheline, Plagioclase

Compound Content

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

Ca, CaO, Carbon, Cl, MgO

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Impact Metamorphism

Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

76.5

1 7

👆🏻

Grain Size

Coarse Grained

Fine Grained

Fracture

Conchoidal

Flat

Streak

Black

White

Porosity

Highly Porous

Less Porous

Luster

Vitreous to Metallic

Compressive Strength

225.00 N/mm²35.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

1.6

2.7

Specific Gravity

2.86-2.872.4-2.9

0 8.4

👆🏻

Transparency

Opaque

Density

2.7-3.3 g/cm³2.5-3 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.52 kJ/Kg K0.88 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

Japan

Africa

South Africa

Rwanda, Tanzania

Europe

Germany, Greece, Italy, Scotland, Turkey

Others

Greenland

Hawaii Islands

Deposits in Western Continents

North America

Canada, USA

South America

Brazil, Colombia, Venezuela

Colombia

Deposits in Oceania Continent

Australia

New Zealand, Queensland

All about Norite and Nephelinite Properties

Know all about Norite and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Norite and Nephelinite belong to Igneous Rocks.Texture of Norite is Phaneritic whereas that of Nephelinite is Aphanitic. Norite appears Veined and Shiny and Nephelinite appears Skeletal. The luster of Norite is while that of Nephelinite is vitreous to metallic. Norite is available in dark grey to black colors whereas Nephelinite is available in black, brown, green, grey, white colors. The commercial uses of Norite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).