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Shonkinite vs Essexite 


Essexite  vs Shonkinite


Definition

Definition
Shonkinite is a rare, dark-coloured and intrusive igneous rock which contains augite and orthoclase feldspar as its primary constituents   
Essexite which is also known as nepheline monzogabbro, is a dark gray or black holocrystalline plutonic Iigneous Rock   

History
  
  

Origin
USA   
USA   

Discoverer
Unknown   
Unknown   

Etymology
From the name of Shonkin Sag ranges in the Highwood Mountains of north-central Montana, US   
From the locality in Essex County, Massachusetts,US   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Plutonic   

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

Texture

Texture
Earthy   
Granular   

Color
Brown, Buff, Cream, Green, Grey, Pink, White   
Dark Grey to Black   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
Yes   

Wind Resistant
No   
Yes   

Acid Resistant
No   
No   

Appearance
Banded and Foilated   
Banded   

Uses

Architecture
  
  

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

Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone   
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, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories   
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate   

Medical Industry
Not Yet Used   
Not Yet Used   

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

Other Uses
  
  

Commercial Uses
Cemetery Markers, Creating Artwork   
Cemetery Markers, Commemorative Tablets, Jewelry, Sea Defence, Tombstones   

Types

Types
Not Available   
Not Available   

Features
Available in Lots of Colors and Patterns, Is one of the oldest rock, Matrix variable   
Is one of the oldest rock, Smooth to touch   

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
Shonkinites are formed due to alkaline igneous activities and are generally formed in thick continental crustal areas or in Cordilleran subduction zones.   
Essexite is a type of igneous rock, which is usually dark grey to black plutonic rock. For the formation of essexite, suitable magma with exact composition of K, Ba, Rb, Cs, Sr should be produced.   

Composition
  
  

Mineral Content
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz   
Augite, Feldspar, Hornblende, Nepheline, Olivine, Plagioclase, Pyroxene   

Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide   
Aluminium Oxide, Ba, Ca, Cs, Potassium, Rb, Sodium, Sr   

Transformation
  
  

Metamorphism
Yes   
Yes   

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

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
5.5-6   
7   

Grain Size
Medium to Fine Coarse Grained   
Fine Grained   

Fracture
Not Available   
Conchoidal   

Streak
White   
Black   

Porosity
Less Porous   
Highly Porous   

Luster
Subvitreous to Dull   
Not Available   

Compressive Strength
150.00 N/mm2   
14
Not Available   

Cleavage
Perfect   
Not Available   

Toughness
Not Available   
1.6   

Specific Gravity
2.6-2.7   
Not Available   

Transparency
Opaque   
Opaque   

Density
2.6-2.8 g/cm3   
Not Available   

Thermal Properties
  
  

Specific Heat Capacity
0.92 kJ/Kg K   
10
Not Available   

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam   
India, Russia   

Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa   
South Africa   

Europe
Bulgaria, England, Germany, Norway, Romania, Switzerland   
Germany, Greece, Italy, Scotland, Turkey   

Others
Not Yet Found   
Greenland   

Deposits in Western Continents
  
  

North America
USA   
Canada, USA   

South America
Brazil, Chile   
Brazil, Colombia, Venezuela   

Deposits in Oceania Continent
  
  

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

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Shonkinite vs Essexite  Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Shonkinite and Essexite  Reserves. Shonkinite is a rare, dark-coloured and intrusive igneous rock which contains augite and orthoclase feldspar as its primary constituents. Essexite which is also known as nepheline monzogabbro, is a dark gray or black holocrystalline plutonic Iigneous Rock. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Shonkinite vs Essexite  information and Shonkinite vs Essexite  characteristics in the upcoming sections.

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Shonkinite vs Essexite  Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Shonkinite vs Essexite  characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Shonkinite and Properties of Essexite . Learn more about Shonkinite vs Essexite  in the next section. The interior uses of Shonkinite include Decorative aggregates, Flooring, Homes and Interior decoration whereas the interior uses of Essexite  include Decorative aggregates, Homes and Interior decoration. Due to some exceptional properties of Shonkinite and Essexite , they have various applications in construction industry. The uses of Shonkinite in construction industry include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate, Landscaping, Making natural cement, Manufacture of magnesium and dolomite refractories and that of Essexite  include As dimension stone, Building houses or walls, Cement manufacture, Construction aggregate, For road aggregate.

More about Shonkinite and Essexite 

Here you can know more about Shonkinite and Essexite . The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Shonkinite and Essexite  consists of mineral content and compound content. The mineral content of Shonkinite includes Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz and mineral content of Essexite  includes Augite, Feldspar, Hornblende, Nepheline, Olivine, Plagioclase, Pyroxene. You can also check out the list of all Igneous Rocks. When we have to compare Shonkinite vs Essexite , the texture, color and appearance plays an important role in determining the type of rock. Shonkinite is available in brown, buff, cream, green, grey, pink, white colors whereas, Essexite  is available in dark grey to black colors. Appearance of Shonkinite is Banded and Foilated and that of Essexite  is Banded. Properties of rock is another aspect for Shonkinite vs Essexite . The hardness of Shonkinite is 5.5-6 and that of Essexite  is 7. The types of Shonkinite are Not Available whereas types of Essexite  are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Shonkinite is white while that of Essexite  is black. The specific heat capacity of Shonkinite is 0.92 kJ/Kg K and that of Essexite  is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Shonkinite is heat resistant, impact resistant, wear resistant whereas Essexite  is impact resistant, pressure resistant, wear resistant.

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