Tuff

Charnockite

Tuff and Charnockite

Tuff

Charnockite

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Definition

Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption

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

History

Origin

Italy

Tamil Nadu, India

Discoverer

Unknown

T. H. Holland

Etymology

From a Latin word tophous then in Italian tufo and finally tuff

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

Clastic, Pyroclastic

Granular

Color

Brown, Grey, Yellow

Black, Grey, Orange, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Vesicular and Foilated

Veined or Pebbled

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, 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, Office Buildings, Paving Stone

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

Other Architectural Uses

Curbing

Industry

Construction Industry

Building houses or walls, Construction Aggregate

As Dimension Stone

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Creating Artwork

Curling, Gemstone, Laboratory bench tops, Tombstones

Types

Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.

Enderbite

Features

Always found as volcanic pipes over deep continental crust

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

Archaeological Significance

Monuments

Famous Monuments

Easter Island in the Polynesian Triangle, Pacific Ocean

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Tuff is formed when large masses of ash and sand which are mixed with hot gases are ejected by a volcano and avalanche rapidly down its slopes.

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

Composition

Mineral Content

Calcite, Chlorite

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

Compound Content

Hydrogen Sulfide, Sulfur 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, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

Burial Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering

Erosion

✔ ✘

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

4-66-7

1 7

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Grain Size

Fine Grained

Coarse Grained

Fracture

Uneven

Streak

White

Porosity

Highly Porous

Very Less Porous

Luster

Vitreous to Dull

Compressive Strength

243.80 N/mm²190.00 N/mm²

0.15 450

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Cleavage

Toughness

Specific Gravity

2.73-9999

0 8.4

👆🏻

Transparency

Opaque

Density

1-1.8 g/cm³2.6 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.20 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Armenia, Azerbaijan, Burma, Cambodia, China, India, Indonesia, Iran, Japan, Malaysia, Mongolia, Nepal, North Korea, Pakistan, Saudi Arabia, Syria, Taiwan, Thailand, Turkey, Vietnam, Yemen

India

Africa

Cameroon, Cape Verde, Eritrea, Ethiopia, Kenya, Libya, Madagascar, Nigeria, Rwanda, South Africa, Sudan, Uganda

East Africa, Ethiopia, Madagascar, Morocco, Mozambique

Europe

France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom

Albania, Romania, Scotland, United Kingdom

Others

Antarctica, Hawaii Islands

Deposits in Western Continents

North America

Canada, Costa Rica, Panama, USA

USA

South America

Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay

Brazil, Colombia, Venezuela

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

All about Tuff and Charnockite Properties

Know all about Tuff and Charnockite properties here. All properties of rocks are important as they define the type of rock and its application. Tuff and Charnockite belong to Igneous Rocks.Texture of Tuff is Clastic, Pyroclastic whereas that of Charnockite is Granular. Tuff appears Dull, Vesicular and Foilated and Charnockite appears Veined or Pebbled. The luster of Tuff is vitreous to dull while that of Charnockite is . Tuff is available in brown, grey, yellow colors whereas Charnockite is available in black, grey, orange, pink, white colors. The commercial uses of Tuff are creating artwork and that of Charnockite are curling, gemstone, laboratory bench tops, tombstones.