Charnockite

Nephelinite

Charnockite and Nephelinite

Charnockite

Nephelinite

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1 Definition

1.1 Definition

Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar

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

1.2 History

1.2.1 Origin

Tamil Nadu, India

Brazil

1.2.2 Discoverer

T. H. Holland

Unknown

1.3 Etymology

From Job Charnock, an administtrator of East India Company

from French néphéline, from Greek nephelē

1.4 Class

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Plutonic

1.6 Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Granular

Aphanitic

2.2 Color

Black, Grey, Orange, Pink, White

Black, Brown, Colourless, Green, Grey, White

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Veined or Pebbled

Skeletal

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Homes, Hotels, Kitchens, Stair Treads

Decorative Aggregates, Homes, Interior Decoration

3.1.2 Exterior Uses

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

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

As Dimension Stone

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

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

3.4 Other Uses

3.4.1 Commercial Uses

Curling, Gemstone, Laboratory bench tops, Tombstones

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

4 Types

4.1 Types

Enderbite

Peralkaline Nephelinite

4.2 Features

Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock

Host Rock for Lead

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Data Not Available

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

4.3.5 Pictographs

Not Used

4.3.6 Petroglyphs

Not Used

4.3.7 Figurines

Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

Charnockite is an intrusive igneous rock which is very hard and is formed due to weathering of existing 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.

5.2 Composition

5.2.1 Mineral Content

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz

Clinopyroxene, Nepheline, Plagioclase

5.2.2 Compound Content

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

Ca, CaO, Carbon, Cl, MgO

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Contact Metamorphism, Regional Metamorphism

Contact Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Chemical Erosion, Water Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6-76.5

1 7

6.1.2 Grain Size

Coarse Grained

Fine Grained

6.1.3 Fracture

Not Available

Flat

6.1.4 Streak

White

6.1.5 Porosity

Very Less Porous

Less Porous

6.1.6 Luster

Not Available

Vitreous to Metallic

6.1.7 Compressive Strength

NA35.00 N/mm²

0.15 450

6.1.8 Cleavage

Not Available

Imperfect

6.1.9 Toughness

Not Available

2.7

6.1.10 Specific Gravity

Not Available2.4-2.9

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

2.6 g/cm³2.5-3 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

NA0.88 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Wear Resistant

Heat Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

India

Japan

7.1.2 Africa

East Africa, Ethiopia, Madagascar, Morocco, Mozambique

Rwanda, Tanzania

7.1.3 Europe

Albania, Romania, Scotland, United Kingdom

Not Yet Found

7.1.4 Others

Not Yet Found

Hawaii Islands

7.2 Deposits in Western Continents

7.2.1 North America

USA

Canada, USA

7.2.2 South America

Brazil, Colombia, Venezuela

Colombia

7.3 Deposits in Oceania Continent

7.3.1 Australia

Central Australia, Western Australia

Not Yet Found

All about Charnockite and Nephelinite Properties

Know all about Charnockite and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Charnockite and Nephelinite belong to Igneous Rocks.Texture of Charnockite is Granular whereas that of Nephelinite is Aphanitic. Charnockite appears Veined or Pebbled and Nephelinite appears Skeletal. The luster of Charnockite is not available while that of Nephelinite is vitreous to metallic. Charnockite is available in black, grey, orange, pink, white colors whereas Nephelinite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Charnockite are curling, gemstone, laboratory bench tops, tombstones and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).