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Comendite and Blue Granite


Blue Granite and Comendite


Definition

Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite   
Blue Granite is an igneous rock and a variety of Larvikite, notable for the presence of thumbnail-sized blue crystals of feldspar   

History
  
  

Origin
Italy   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy   
From the color of rock, Blue   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Volcanic   
Volcanic   

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

Texture

Texture
Porphyritic   
Phaneritic   

Color
Blue, Bluish - Grey   
Black, Brown, Light to Dark Grey, White   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
Yes   

Wind Resistant
Yes   
Yes   

Acid Resistant
Yes   
No   

Appearance
Foliated   
Shiny   

Uses

Architecture
  
  

Interior Uses
Countertops, Decorative Aggregates, Interior Decoration   
Decorative Aggregates, Floor Tiles, Flooring, Interior Decoration   

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Raw material for the manufacture of mortar   
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts   
Artifacts, Monuments, Sculpture, Small Figurines   

Other Uses
  
  

Commercial Uses
Cemetery Markers   
Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling   

Types

Types
Rhyolite   
Not Available   

Features
Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock   
Available in lots of colors, Is one of the oldest rock   

Archaeological Significance
  
  

Monuments
Not Yet Used   
Used   

Famous Monuments
Not Applicable   
Data Not Available   

Sculpture
Not Yet Used   
Used   

Famous Sculptures
Not Applicable   
Data Not Available   

Pictographs
Not Used   
Not Used   

Petroglyphs
Not Used   
Not Used   

Figurines
Not Yet Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Comendite is a type of Igneous rock which is formed due to cooling and solidification of lava or magma. It may form with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.   
Blue Granite is an igneous rock which is a variety of Larvikite and is known mainly for the presence of thumbnail-sized crystals of feldspar.   

Composition
  
  

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

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

Transformation
  
  

Metamorphism
Yes   
Yes   

Types of Metamorphism
Cataclastic Metamorphism, Regional Metamorphism   
Burial Metamorphism, Cataclastic Metamorphism   

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

Types of Erosion
Coastal Erosion, Water Erosion   
Chemical Erosion, Coastal Erosion, Water Erosion   

Properties

Physical Properties
  
  

Hardness
6-7   
6-7   

Grain Size
Medium Grained   
Medium to Fine Coarse Grained   

Fracture
Pervasive   
Not Available   

Streak
Bluish Black   
White   

Porosity
Highly Porous   
Less Porous   

Luster
Dull   
Subvitreous to Dull   

Compressive Strength
92.40 N/mm2   
21
175.00 N/mm2   
13

Cleavage
Not Available   
Not Available   

Toughness
2   
Not Available   

Specific Gravity
2.38   
2.8-3   

Transparency
Opaque   
Opaque   

Density
Not Available   
2.9-2.91 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
0.79 kJ/Kg K   
16

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China   
Not Yet Found   

Africa
East Africa   
Not Yet Found   

Europe
Italy   
Bulgaria, England, Germany, Norway, Romania, Switzerland   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Not Yet Found   
USA   

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

Deposits in Oceania Continent
  
  

Australia
Queensland   
New South Wales, New Zealand, Queensland, South Australia, Western Australia   

Summary >>
<< Reserves

All about Comendite and Blue Granite Properties

Know all about Comendite and Blue Granite properties here. All properties of rocks are important as they define the type of rock and its application. Comendite and Blue Granite belong to Igneous Rocks.Texture of Comendite is Porphyritic whereas that of Blue Granite is Phaneritic. Comendite appears Foliated and Blue Granite appears Shiny. The luster of Comendite is dull while that of Blue Granite is subvitreous to dull. Comendite is available in blue, bluish - grey colors whereas Blue Granite is available in black, brown, light to dark grey, white colors. The commercial uses of Comendite are cemetery markers and that of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling.

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