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Granulite and Icelandite


Icelandite and Granulite


Definition

Definition
Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.   
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock   

History
  
  

Origin
Central Europe   
Iceland   

Discoverer
Unknown   
Ian S. E. Carmichael   

Etymology
From Latin granulum, a little grain or fine grained   
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland   

Class
Metamorphic Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Volcanic   

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

Texture

Texture
Granoblastic   
Aphanitic to Porphyritic   

Color
Black, Brown   
Bluish - Grey, Grey, Pink, Yellow   

Maintenance
Less   
More   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
No   

Wind Resistant
No   
Yes   

Acid Resistant
No   
No   

Appearance
Veined or Pebbled   
Dull and Soft   

Uses

Architecture
  
  

Interior Uses
Bathrooms, Countertops, Decorative Aggregates, Entryways, Flooring, Homes, Hotels, Interior Decoration, Kitchens, Stair Treads   
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens   

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

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

Medical Industry
Not Yet Used   
Not Yet Used   

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

Other Uses
  
  

Commercial Uses
Curling, Gemstone, Laboratory bench tops, Soil Conditioner, Tombstones   
Cemetery Markers, Creating Artwork   

Types

Types
Not Available   
Not Available   

Features
Clasts are smooth to touch   
Generally rough to touch, High silica content, Is one of the oldest rock   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Data Not Available   
Not Applicable   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Not Used   
Not Used   

Petroglyphs
Not Used   
Not Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Granulite is a fine-grained granular metamorphic rock in which the main component minerals are feldspars and quartz and forms at high temperature and pressure conditions.   
Icelandite 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.   

Composition
  
  

Mineral Content
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Quartz   
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon   

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

Transformation
  
  

Metamorphism
No   
Yes   

Types of Metamorphism
Not Applicable   
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism   

Weathering
Yes   
Yes   

Types of Weathering
Biological Weathering, Chemical Weathering   
Biological Weathering   

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
6-7   
7   

Grain Size
Medium to Coarse Grained   
Very fine-grained   

Fracture
Not Available   
Uneven   

Streak
White   
White   

Porosity
Very Less Porous   
Less Porous   

Luster
Vitreous   
Vitreous   

Compressive Strength
175.00 N/mm2   
13
Not Available   

Cleavage
Imperfect   
Not Available   

Toughness
Not Available   
1.1   

Specific Gravity
2.8-3.0   
2.5-2.8   

Transparency
Opaque   
Opaque   

Density
3.06-3.33 g/cm3   
2.11-2.36 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.14 kJ/Kg K   
26
2.39 kJ/Kg K   
2

Resistance
Heat Resistant, Wear Resistant   
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam   
India, Indonesia, Japan, Nepal, South Korea   

Africa
Angola, Egypt, Madagascar, Nigeria, South Africa   
Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania   

Europe
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic, Venezuela   
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Mexico, USA   

South America
Not Yet Found   
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela   

Deposits in Oceania Continent
  
  

Australia
Not Yet Found   
New South Wales, New Zealand, Western Australia   

Summary >>
<< Reserves

All about Granulite and Icelandite Properties

Know all about Granulite and Icelandite properties here. All properties of rocks are important as they define the type of rock and its application. Granulite belongs to Metamorphic Rocks while Icelandite belongs to Igneous Rocks.Texture of Granulite is Granoblastic whereas that of Icelandite is Aphanitic to Porphyritic. Granulite appears Veined or Pebbled and Icelandite appears Dull and Soft. The luster of Granulite and Icelandite is vitreous. Granulite is available in black, brown colors whereas Icelandite is available in bluish - grey, grey, pink, yellow colors. The commercial uses of Granulite are curling, gemstone, laboratory bench tops, soil conditioner, tombstones and that of Icelandite are cemetery markers, creating artwork.

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