Home
Compare Rocks


Diorite and Tuff


Tuff and Diorite


Definition

Definition
Diorite is a grey to dark-grey intermediate intrusive igneous rock composed principally of plagioclase feldspar,biotite, hornblende, and pyroxene  
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption  

History
  
  

Origin
-  
Italy  

Discoverer
Unknown  
Unknown  

Etymology
From early 19th century coined in French, formed irregularly from Greek diorizein distinguish  
From a Latin word tophous then in Italian tufo and finally tuff  

Class
Igneous Rocks  
Igneous Rocks  

Sub-Class
Durable Rock, Hard Rock  
Durable Rock, Medium Hardness Rock  

Family
  
  

Group
Plutonic  
Volcanic  

Other Categories
Coarse Grained Rock, Medium Grained Rock, Opaque Rock  
Fine Grained Rock, Opaque Rock  

Texture

Texture
Phaneritic  
Clastic, Pyroclastic  

Color
Black, Brown, Light to Dark Grey, White  
Brown, Grey, Yellow  

Maintenance
Less  
More  

Durability
Durable  
Durable  

Water Resistant
No  
Yes  

Scratch Resistant
No  
Yes  

Stain Resistant
No  
No  

Wind Resistant
Yes  
No  

Acid Resistant
No  
No  

Appearance
Shiny  
Dull, Vesicular and Foilated  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Interior Decoration  
Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration  

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

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
As Dimension Stone, Cement Manufacture, Cobblestones, Construction Aggregate, for Road Aggregate  
Building houses or walls, Construction Aggregate  

Medical Industry
-  
-  

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines  
Artifacts, Monuments, Sculpture, Small Figurines  

Other Uses
  
  

Commercial Uses
Creating Artwork, Curling  
Creating Artwork  

Types

Types
Plagioclase Diorite and Quartz Diorite  
Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.  

Features
Typically speckled black and white.  
Always found as volcanic pipes over deep continental crust  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
Easter Island in the Polynesian Triangle, Pacific Ocean  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Diorite is a coarse-grained intrusive igneous rock which contains large interlocking and randomly oriented crystals and forms when molten lava does not reach the Earth’s surface and cools down in the Earth’s crust.  
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.  

Composition
  
  

Mineral Content
Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon  
Calcite, Chlorite  

Compound Content
Silicon Dioxide  
Hydrogen Sulfide, Sulfur Dioxide  

Transformation
  
  

Metamorphism
Yes  
Yes  

Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism  
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism  

Weathering
Yes  
Yes  

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering  
Biological Weathering, Chemical Weathering, Mechanical Weathering  

Erosion
Yes  
Yes  

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

Properties

Physical Properties
  
  

Hardness
6-7  
4-6  

Grain Size
Medium to Coarse Grained  
Fine Grained  

Fracture
-  
Uneven  

Streak
Bluish Black  
White  

Porosity
Very Less Porous  
Highly Porous  

Luster
Shiny  
Vitreous to Dull  

Compressive Strength
225.00 N/mm2  
8
243.80 N/mm2  
6

Cleavage
-  
-  

Toughness
2.1  
-  

Specific Gravity
2.8-3  
2.73  

Transparency
Opaque  
Opaque  

Density
2.8-3 g/cm3  
1-1.8 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.84 kJ/Kg K  
15
0.20 kJ/Kg K  
32

Resistance
Heat Resistant, Pressure Resistant, Wear Resistant  
Heat Resistant, Impact Resistant, Pressure 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  

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

Europe
Finland, Germany, Italy, Romania, Sweden, Turkey, United Kingdom  
France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom  

Others
-  
Antarctica, Hawaii Islands  

Deposits in Western Continents
  
  

North America
USA  
Canada, Costa Rica, Panama, USA  

South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru  
Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay  

Deposits in Oceania Continent
  
  

Australia
New Zealand, Western Australia  
Central Australia, Western Australia  

Summary >>
<< Reserves

All about Diorite and Tuff Properties

Know all about Diorite and Tuff properties here. All properties of rocks are important as they define the type of rock and its application. Diorite and Tuff belong to Igneous Rocks.Texture of Diorite is Phaneritic whereas that of Tuff is Clastic, Pyroclastic. Diorite appears Shiny and Tuff appears Dull, Vesicular and Foilated. The luster of Diorite is shiny while that of Tuff is vitreous to dull. Diorite is available in black, brown, light to dark grey, white colors whereas Tuff is available in brown, grey, yellow colors. The commercial uses of Diorite and Tuff are creating artwork, curling.

Compare Igneous Rocks

Igneous Rocks

Igneous Rocks

» More Igneous Rocks

Compare Igneous Rocks

» More Compare Igneous Rocks