Definition
Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).
  
Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava
  
History
  
  
Origin
Brazil
  
North America
  
Discoverer
Unknown
  
Unknown
  
Etymology
from French néphéline, from Greek nephelē
  
From Andes mountains, where it is found in abundance
  
Class
Igneous Rocks
  
Igneous Rocks
  
Sub-Class
Durable Rock, Hard Rock
  
Durable Rock, Hard Rock
  
Family
  
  
Group
Plutonic
  
Volcanic
  
Other Categories
Fine Grained Rock, Opaque Rock
  
Fine Grained Rock, Opaque Rock
  
Texture
Aphanitic
  
Aphanitic to Porphyritic
  
Color
Black, Brown, Colourless, Green, Grey, White
  
Bluish - Grey, Grey, Pink, Yellow
  
Maintenance
Less
  
More
  
Durability
Durable
  
Durable
  
Water Resistant
Yes
  
No
  
Scratch Resistant
Yes
  
Yes
  
Stain Resistant
Yes
  
Yes
  
Wind Resistant
Yes
  
No
  
Acid Resistant
Yes
  
Yes
  
Appearance
Skeletal
  
Dull and Soft
  
Architecture
  
  
Interior Uses
Decorative Aggregates, Homes, Interior Decoration
  
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, Cement Manufacture, Construction Aggregate, for Road Aggregate
  
Cobblestones, Construction Aggregate, for Road Aggregate
  
Medical Industry
Not Yet Used
  
Not Yet Used
  
Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines
  
Artifacts, Monuments, Sculpture, Small Figurines
  
Other Uses
  
  
Commercial Uses
Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)
  
Commemorative Tablets, Creating Artwork
  
Types
Peralkaline Nephelinite
  
Icelandite
  
Features
Host Rock for Lead
  
Generally rough to touch, High silica content, Is one of the oldest rock
  
Archaeological Significance
  
  
Monuments
Used
  
Used
  
Famous Monuments
Data Not Available
  
Middle of the Earth in Ecuador
  
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
Nephelinite 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.
  
Andesite is a fine-grained igneous rock that forms when the magma is erupted onto the surface and is crystallized quickly.
  
Composition
  
  
Mineral Content
Clinopyroxene, Nepheline, Plagioclase
  
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon
  
Compound Content
Ca, CaO, Carbon, Cl, MgO
  
Silicon Dioxide
  
Transformation
  
  
Metamorphism
Yes
  
Yes
  
Types of Metamorphism
Contact 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, Water Erosion, Wind Erosion
  
Chemical Erosion, Coastal Erosion, Glacier Erosion
  
Physical Properties
  
  
Hardness
6.5
  
7
  
Grain Size
Fine Grained
  
Very fine-grained
  
Fracture
Flat
  
Uneven
  
Streak
White
  
White
  
Porosity
Less Porous
  
Less Porous
  
Luster
Vitreous to Metallic
  
Vitreous
  
Compressive Strength
35.00 N/mm2
  
29
225.00 N/mm2
  
7
Cleavage
Imperfect
  
Not Available
  
Toughness
2.7
  
1.1
  
Specific Gravity
2.4-2.9
  
2.5-2.8
  
Transparency
Opaque
  
Opaque
  
Density
2.5-3 g/cm3
  
2.11-2.36 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
0.88 kJ/Kg K
  
13
2.39 kJ/Kg K
  
2
Resistance
Heat Resistant
  
Heat Resistant, Pressure Resistant, Wear Resistant
  
Deposits in Eastern Continents
  
  
Asia
Japan
  
India, Indonesia, Japan, Nepal, South Korea
  
Africa
Rwanda, Tanzania
  
Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania
  
Europe
Not Yet Found
  
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom
  
Others
Hawaii Islands
  
Not Yet Found
  
Deposits in Western Continents
  
  
North America
Canada, USA
  
Mexico, USA
  
South America
Colombia
  
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
  
Deposits in Oceania Continent
  
  
Australia
Not Yet Found
  
New South Wales, New Zealand, Western Australia
  
Nephelinite vs Andesite 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. Nephelinite vs Andesite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Nephelinite and Properties of Andesite. Learn more about Nephelinite vs Andesite in the next section. The interior uses of Nephelinite include Decorative aggregates, Homes and Interior decoration whereas the interior uses of Andesite include Decorative aggregates, Floor tiles, Homes, Interior decoration and Kitchens. Due to some exceptional properties of Nephelinite and Andesite, they have various applications in construction industry. The uses of Nephelinite in construction industry include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate and that of Andesite include Cobblestones, Construction aggregate, For road aggregate.
More about Nephelinite and Andesite
Here you can know more about Nephelinite and Andesite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Nephelinite and Andesite consists of mineral content and compound content. The mineral content of Nephelinite includes Clinopyroxene, Nepheline, Plagioclase and mineral content of Andesite includes Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon. You can also check out the list of all Igneous Rocks. When we have to compare Nephelinite vs Andesite, the texture, color and appearance plays an important role in determining the type of rock. Nephelinite is available in black, brown, colourless, green, grey, white colors whereas, Andesite is available in bluish - grey, grey, pink, yellow colors. Appearance of Nephelinite is Skeletal and that of Andesite is Dull and Soft. Properties of rock is another aspect for Nephelinite vs Andesite. The hardness of Nephelinite is 6.5 and that of Andesite is 7. The types of Nephelinite are Peralkaline Nephelinite whereas types of Andesite are Icelandite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Nephelinite and Andesite is white. The specific heat capacity of Nephelinite is 0.88 kJ/Kg K and that of Andesite is 2.39 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Nephelinite is heat resistant whereas Andesite is heat resistant, pressure resistant, wear resistant.