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Foidolite and Skarn


Skarn and Foidolite


Definition

Definition
Foidolite is a rare type of coarse-grained intrusive igneous rock with a feldspathoid mineral content greater than 60%   
Skarns are formed during regional or contact metamorphism and from a variety of metasomatic processes involving fluids of magmatic, metamorphic, and/or marine origin   

History
  
  

Origin
Unknown   
USA, Australia   

Discoverer
Unknown   
Tornebohm   

Etymology
From the mineral feldspathoid which is the main content of rock   
From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.   

Class
Igneous Rocks   
Metamorphic Rocks   

Sub-Class
Durable Rock, Soft Rock   
Durable Rock, Hard Rock   

Family
  
  

Group
Plutonic   
Not Applicable   

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

Texture

Texture
Earthy   
Earthy, Mud-rich, Rough   

Color
Black, Brown, Colourless, Green, Grey, Pink, White   
Black, Brown, Colourless, Green, Grey, White   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
No   

Wind Resistant
No   
Yes   

Acid Resistant
No   
Yes   

Appearance
Dull   
Dull   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Interior Decoration   
Decorative Aggregates, Entryways, Interior Decoration   

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Cement Manufacture, for Road Aggregate   
As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Gold and Silver production, Manufacture of Magnesium and Dolomite Refractories   

Medical Industry
Taken as a Supplement for Calcium or Magnesium   
Not Applicable   

Antiquity Uses
Artifacts, Monuments, Sculpture   
Artifacts, Monuments, Sculpture   

Other Uses
  
  

Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork   
Creating Artwork, Gemstone, Jewelry, Metallurgical Flux, Source of Magnesia (MgO)   

Types

Types
Not Available   
Endoskarns   

Features
Host Rock for Lead   
Host Rock for Lead, Zinc and Copper Deposits   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Data Not Available   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Used   
Not Used   

Petroglyphs
Used   
Not Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Foidolites is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.   
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Skarn is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.   

Composition
  
  

Mineral Content
Amphibole, Biotite, Feldspar, Olivine, Plagioclase, Pyroxene   
Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite   

Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO   
Au, CaO, Carbon Dioxide, Cu, Fe, MgO   

Transformation
  
  

Metamorphism
Yes   
Yes   

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

Weathering
No   
No   

Types of Weathering
Not Applicable   
Not Applicable   

Erosion
No   
No   

Types of Erosion
Not Applicable   
Not Applicable   

Properties

Physical Properties
  
  

Hardness
1.5   
6.5   

Grain Size
Medium to Fine Coarse Grained   
Fine Grained   

Fracture
Conchoidal   
Irregular   

Streak
White   
Light to dark brown   

Porosity
Very Less Porous   
Less Porous   

Luster
Subvitreous to Dull   
Waxy and Dull   

Cleavage
Perfect   
Slaty   

Toughness
Not Available   
2.4   

Specific Gravity
2.86   
2.86   

Transparency
Translucent   
Opaque   

Density
Not Available   
2.8-2.9 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
0.92 kJ/Kg K   
10

Resistance
Heat Resistant, Wear Resistant   
Heat Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
Russia   
China, India, Russia, Saudi Arabia, South Korea, Sri Lanka   

Africa
South Africa, Western Africa   
South Africa, Western Africa   

Europe
Not Yet Found   
United Kingdom   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Canada   

South America
Not Yet Found   
Brazil, Colombia, Paraguay   

Deposits in Oceania Continent
  
  

Australia
Central Australia, Western Australia   
Central Australia, Western Australia   

Summary >>
<< Reserves

All about Foidolite and Skarn Properties

Know all about Foidolite and Skarn properties here. All properties of rocks are important as they define the type of rock and its application. Foidolite belongs to Igneous Rocks while Skarn belongs to Metamorphic Rocks.Texture of Foidolite is Earthy whereas that of Skarn is Earthy, Mud-rich, Rough. Foidolite appears Dull and Skarn appears Dull. The luster of Foidolite is subvitreous to dull while that of Skarn is waxy and dull. Foidolite and Skarn are available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Foidolite are cemetery markers, commemorative tablets, creating artwork and that of Skarn are creating artwork, gemstone, jewelry, metallurgical flux, source of magnesia (mgo).

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