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Gabbro and Felsite


Felsite and Gabbro


Definition

Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt   
Felsite is a very fine grained volcanic rock that may or may not contain larger crystals and light colored rock that typically requires petrographic examination or chemical analysis for more precise definition   

History
  
  

Origin
Germany   
Unknown   

Discoverer
Christian Leopold von Buch   
Unknown   

Etymology
From Latin glaber bare, smooth, bald   
From English feldspar and -ite   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Plutonic   
Volcanic   

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

Texture

Texture
Phaneritic   
Arborescent Patterned, Vitreous   

Color
Dark Grey to Black   
Black, Blue, Brown, Green, Orange, Red, Tan, Yellow   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
No   

Wind Resistant
Yes   
Yes   

Acid Resistant
Yes   
No   

Appearance
Veined and Shiny   
Layered, Banded, Veined and Shiny   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate   
Arrowheads, Cutting Tool, Knives, Scrapers, Spear Points   

Medical Industry
Not Yet Used   
Surgery   

Antiquity Uses
Artifacts, Monuments, Sculpture   
Artifacts   

Other Uses
  
  

Commercial Uses
Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones   
Mirror, Jewelry   

Types

Types
Not Available   
Not Available   

Features
Smooth to touch   
Available in Lots of Colors and Patterns, Clasts are smooth to touch, Splintery, Very fine grained rock   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Data Not Available   
Not Applicable   

Sculpture
Used   
Not Yet Used   

Famous Sculptures
Data Not Available   
Not Applicable   

Pictographs
Not Used   
Used   

Petroglyphs
Not Used   
Used   

Figurines
Used   
Not Yet Used   

Fossils
Absent   
Absent   

Formation

Formation
Gabbro, a mafic rock, forms due to cooling and crystallization of magma underneath Earth's surface.   
Felsite 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
Augite, Olivine, Plagioclase, Pyroxene   
Feldspar, Iron Oxides   

Compound Content
Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide   
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
Impact Metamorphism   
Burial Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism   

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
7   
5-5.5   

Grain Size
Coarse Grained   
Fine Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
Black   
White   

Porosity
Highly Porous   
Very Less Porous   

Luster
Not Available   
Vitreous   

Compressive Strength
225.00 N/mm2   
7
0.15 N/mm2   
33

Cleavage
Not Available   
Non-Existent   

Toughness
1.6   
Not Available   

Specific Gravity
2.86-2.87   
2.6-2.7   

Transparency
Opaque   
Translucent   

Density
2.7-3.3 g/cm3   
2.6 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
0.92 kJ/Kg K   
10

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

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Russia   
Afghanistan, Indonesia, Japan, Russia   

Africa
South Africa   
Kenya   

Europe
Germany, Greece, Italy, Scotland, Turkey   
Greece, Hungary, Iceland, Italy, Turkey   

Others
Greenland   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Canada, Mexico, USA   

South America
Brazil, Colombia, Venezuela   
Argentina, Chile, Ecuador, Peru   

Deposits in Oceania Continent
  
  

Australia
New Zealand, Queensland   
New Zealand   

Summary >>
<< Reserves

All about Gabbro and Felsite Properties

Know all about Gabbro and Felsite properties here. All properties of rocks are important as they define the type of rock and its application. Gabbro and Felsite belong to Igneous Rocks.Texture of Gabbro is Phaneritic whereas that of Felsite is Arborescent Patterned, Vitreous. Gabbro appears Veined and Shiny and Felsite appears Layered, Banded, Veined and Shiny. The luster of Gabbro is not available while that of Felsite is vitreous. Gabbro is available in dark grey to black colors whereas Felsite is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Felsite are mirror, jewelry.

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