Trachyte and Charnockite

Trachyte

Charnockite

Charnockite and Trachyte

Definition

Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar

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

History

Origin

Unknown

Tamil Nadu, India

Discoverer

Alexandre Brongniart and René Just Haüy

T. H. Holland

Etymology

From Greek trakhus rough’ or trakhutēs roughness

From Job Charnock, an administtrator of East India Company

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Volcanic

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Aphanitic to Porphyritic

Granular

Color

Black, Brown, Dark Greenish - Grey, Green, Grey, Light to Dark Grey, White

Black, Grey, Orange, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Yes

Acid Resistant

Yes

Appearance

Banded

Veined or Pebbled

Uses

Architecture

Interior Uses

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, Paving Stone, Garden Decoration, Office Buildings

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories

As Dimension Stone

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Cemetery Markers, Creating Artwork

Curling, Gemstone, Laboratory bench tops, Tombstones

Types

Not Available

Enderbite

Features

Available in Lots of Colors and Patterns, Is one of the oldest rock, Matrix variable

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

Archaeological Significance

Monuments

Used

Famous Monuments

Data Not Available

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Used

Not Used

Petroglyphs

Used

Not Used

Figurines

Used

Fossils

Absent

Formation

Trachyte is an igneous volcanic rock with an aphanitic to porphyritic texture. It is the volcanic equivalent of syenite rock and forms as a result of magmatic differentiation.

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

Composition

Mineral Content

Augite, Biotite, Feldspar, Hornblade, Plagioclase, Quartz

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

Compound Content

Potassium Oxide, Sodium Oxide, Silicon Dioxide

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

Transformation

Metamorphism

Yes

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Burial Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

Yes

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering

Erosion

Yes

Types of Erosion

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

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

6-7

Grain Size

Fine Grained

Coarse Grained

Fracture

Not Available

Streak

White

Porosity

Less Porous

Very Less Porous

Luster

Metallic

Not Available

Compressive Strength

150.00 N/mm²

Not Available

Cleavage

Not Available

Toughness

Not Available

Specific Gravity

2.7

Not Available

Transparency

Opaque

Density

2.43-2.45 g/cm³

2.6 g/cm³

Thermal Properties

Resistance

Heat Resistant, Impact Resistant, Wear Resistant

Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam

India

Africa

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

East Africa, Ethiopia, Madagascar, Morocco, Mozambique

Europe

Bulgaria, England, Germany, Norway, Romania, Switzerland

Albania, Romania, Scotland, United Kingdom

Others

Not Yet Found

Deposits in Western Continents

North America

USA

South America

Brazil, Chile

Brazil, Colombia, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, Queensland, South Australia, Western Australia

Central Australia, Western Australia

Summary >>

<< Reserves

All about Trachyte and Charnockite Properties

Know all about Trachyte and Charnockite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyte and Charnockite belong to Igneous Rocks.Texture of Trachyte is Aphanitic to Porphyritic whereas that of Charnockite is Granular. Trachyte appears Banded and Charnockite appears Veined or Pebbled. The luster of Trachyte is metallic while that of Charnockite is not available. Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors whereas Charnockite is available in black, grey, orange, pink, white colors. The commercial uses of Trachyte are cemetery markers, creating artwork and that of Charnockite are curling, gemstone, laboratory bench tops, tombstones.