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Nepheline Syenite
Nepheline Syenite

Charnockite
Charnockite



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Nepheline Syenite
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Charnockite

Nepheline Syenite vs Charnockite

Definition

Definition

Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar

History

Origin

-
Tamil Nadu, India

Discoverer

Unknown
T. H. Holland

Etymology

From origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China
From Job Charnock, an administtrator of East India Company

Class

Igneous Rocks
Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock

Family

Group

Plutonic
Plutonic

Other Categories

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

Texture

Texture

Granular
Granular

Color

Brown, Buff, Cream, Green, Grey, Pink, White
Black, Grey, Orange, Pink, White

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Banded and Foilated
Veined or Pebbled

Uses

Architecture

Interior Uses

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

Exterior Uses

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

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics
As Dimension Stone

Medical Industry

-
-

Antiquity Uses

Artifacts, Monuments, Sculpture
Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Cemetery Markers, Creating Artwork
Curling, Gemstone, Laboratory bench tops, Tombstones

Types

Types

Borolanite and Litchfieldite
Enderbite

Features

Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, Is one of the oldest rock
Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Nepheline Syenites are formed due to alkaline igneous activities and are generally formed in thick continental crustal areas or in Cordilleran subduction zones.
Charnockite is an intrusive igneous rock which is very hard and is formed due to weathering of existing rocks.

Composition

Mineral Content

Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz

Compound Content

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

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Impact Metamorphism
Burial Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

Types of Weathering

Biological Weathering, Chemical Weathering
Biological Weathering

Erosion

Types of Erosion

Chemical Erosion
Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5.5-66-7
1 7
👆🏻

Grain Size

Fine Grained
Coarse Grained

Fracture

Conchoidal to Uneven
-

Streak

White
White

Porosity

Less Porous
Very Less Porous

Luster

Greasy to Dull
-

Compressive Strength

150.00 N/mm2190.00 N/mm2
0.15 450
👆🏻

Cleavage

-
-

Toughness

-
-

Specific Gravity

2.6-9999
0 8.4
👆🏻

Transparency

Translucent to Opaque
Opaque

Density

2.6 g/cm32.6 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.71 kJ/Kg K0.84 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant, Impact Resistant, Wear Resistant
Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Indonesia, Iran, Russia, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Turkmenistan, Vietnam
India

Africa

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
East Africa, Ethiopia, Madagascar, Morocco, Mozambique

Europe

Andorra, Finland, France, Great Britain, Italy, Norway, Portugal, Spain, Sweden
Albania, Romania, Scotland, United Kingdom

Others

Greenland
-

Deposits in Western Continents

North America

Canada, USA
USA

South America

Brazil, Chile, Colombia, Uruguay, Venezuela
Brazil, Colombia, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, Queensland, South Australia, Tasmania, Western Australia
Central Australia, Western Australia

Nepheline Syenite vs Charnockite Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Nepheline Syenite and Charnockite Reserves. Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz. Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Nepheline Syenite vs Charnockite information and Nepheline Syenite vs Charnockite characteristics in the upcoming sections.

Nepheline Syenite vs Charnockite Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Nepheline Syenite vs Charnockite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Nepheline Syenite and Properties of Charnockite. Learn more about Nepheline Syenite vs Charnockite in the next section. The interior uses of Nepheline Syenite include Countertops, Decorative aggregates, Flooring, Homes and Interior decoration whereas the interior uses of Charnockite include Bathrooms, Countertops, Decorative aggregates, Entryways, Floor tiles, Homes, Hotels, Kitchens and Stair treads. Due to some exceptional properties of Nepheline Syenite and Charnockite, they have various applications in construction industry. The uses of Nepheline Syenite in construction industry include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate, Landscaping, Making natural cement, Manufacture of magnesium and dolomite refractories, Production of glass and ceramics and that of Charnockite include As dimension stone.

More about Nepheline Syenite and Charnockite

Here you can know more about Nepheline Syenite and Charnockite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Nepheline Syenite and Charnockite consists of mineral content and compound content. The mineral content of Nepheline Syenite includes Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite and mineral content of Charnockite includes Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz. You can also check out the list of all Igneous Rocks. When we have to compare Nepheline Syenite vs Charnockite, the texture, color and appearance plays an important role in determining the type of rock. Nepheline Syenite is available in brown, buff, cream, green, grey, pink, white colors whereas, Charnockite is available in black, grey, orange, pink, white colors. Appearance of Nepheline Syenite is Banded and Foilated and that of Charnockite is Veined or Pebbled. Properties of rock is another aspect for Nepheline Syenite vs Charnockite. The hardness of Nepheline Syenite is 5.5-6 and that of Charnockite is 6-7. The types of Nepheline Syenite are Borolanite and Litchfieldite whereas types of Charnockite are Enderbite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Nepheline Syenite and Charnockite is white. The specific heat capacity of Nepheline Syenite is 0.71 kJ/Kg K and that of Charnockite is 0.84 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Nepheline Syenite is heat resistant, impact resistant, wear resistant whereas Charnockite is heat resistant, wear resistant.