Charnockite and Argillite

Charnockite

Argillite

Definition

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

Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate

History

Origin

Tamil Nadu, India

Unknown

Discoverer

T. H. Holland

Unknown

Etymology

From Job Charnock, an administtrator of East India Company

From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Soft Rock

Family

Group

Plutonic

Not Applicable

Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Granular

Clastic, Polished

Color

Black, Grey, Orange, Pink, White

Dark Grey to Black, Pink, Red, White

Maintenance

Less

Durability

Durable

Water Resistant

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Yes

Acid Resistant

Yes

Appearance

Veined or Pebbled

Rough and Dull

Uses

Architecture

Interior Uses

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

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

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

As Building Stone, Garden Decoration, Office Buildings

Other Architectural Uses

Curbing

Curbing, Whetstones

Industry

Construction Industry

As Dimension Stone

Used for flooring, stair treads, borders and window sills.

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Curling, Gemstone, Laboratory bench tops, Tombstones

Fire resistant, Used to manufracture paperweights and bookends

Types

Enderbite

Not Available

Features

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

Is one of the oldest rock

Archaeological Significance

Monuments

Used

Famous Monuments

Data Not Available

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Not Used

Used

Petroglyphs

Not Used

Used

Figurines

Used

Fossils

Absent

Present

Formation

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

An argillite is a fine-grained sedimentary rock mainly composed of clay particles which forms from lithified muds which contain variable amounts of silt-sized particles.

Composition

Mineral Content

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

Biotite, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz

Compound Content

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

Iron(III) Oxide, Potassium Oxide, MgO, Silicon Dioxide

Transformation

Metamorphism

Yes

Types of Metamorphism

Burial Metamorphism, Contact Metamorphism, Regional Metamorphism

Not Applicable

Weathering

Yes

Types of Weathering

Biological Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Chemical Erosion

Properties

Physical Properties

Hardness

6-7

2-3

Grain Size

Coarse Grained

Fine Grained

Fracture

Not Available

Conchoidal to Uneven

Streak

White

White to Grey

Porosity

Very Less Porous

Highly Porous

Luster

Not Available

Waxy and Dull

Cleavage

Not Available

Slaty

Toughness

Not Available

2.6

Specific Gravity

Not Available

2.56-2.68

Transparency

Opaque

Density

2.6 g/cm³

2.54-2.66 g/cm³

Thermal Properties

Specific Heat Capacity

Not Available

0.87 kJ/Kg K

Resistance

Heat Resistant, Wear Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

India

Bangladesh, China, India, Russia

Africa

East Africa, Ethiopia, Madagascar, Morocco, Mozambique

Ethiopia, Kenya, Morocco, South Africa, Tanzania

Europe

Albania, Romania, Scotland, United Kingdom

Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland

Others

Not Yet Found

Deposits in Western Continents

North America

USA

South America

Brazil, Colombia, Venezuela

Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

New South Wales, New Zealand, Queensland, Victoria, Western Australia

Summary >>

<< Reserves

All about Charnockite and Argillite Properties

Know all about Charnockite and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Charnockite belongs to Igneous Rocks while Argillite belongs to Sedimentary Rocks.Texture of Charnockite is Granular whereas that of Argillite is Clastic, Polished. Charnockite appears Veined or Pebbled and Argillite appears Rough and Dull. The luster of Charnockite is not available while that of Argillite is waxy and dull. Charnockite is available in black, grey, orange, pink, white colors whereas Argillite is available in dark grey to black, pink, red, white colors. The commercial uses of Charnockite are curling, gemstone, laboratory bench tops, tombstones and that of Argillite are fire resistant, used to manufracture paperweights and bookends.