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Granulite

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Granulite vs Obsidian

1 Definition
1.1 Definition
Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth
1.2 History
1.2.1 Origin
Central Europe
Ethiopia
1.2.2 Discoverer
Unknown
Obsius
1.3 Etymology
From Latin granulum, a little grain or fine grained
From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius
1.4 Class
Metamorphic Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
Not Applicable
Volcanic
1.6 Other Categories
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
Opaque Rock
2 Texture
2.1 Texture
Granoblastic
Glassy
2.2 Color
Black, Brown
Black, Blue, Brown, Green, Orange, Red, Tan, Yellow
2.3 Maintenance
Less
Less
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
81% Metamorphic Rocks Rocks have it !
81% Igneous Rocks Rocks have it !
2.4.2 Scratch Resistant
65% Metamorphic Rocks Rocks have it !
86% Igneous Rocks Rocks have it !
2.4.3 Stain Resistant
42% Metamorphic Rocks Rocks have it !
66% Igneous Rocks Rocks have it !
2.4.4 Wind Resistant
19% Metamorphic Rocks Rocks have it !
49% Igneous Rocks Rocks have it !
2.4.5 Acid Resistant
15% Metamorphic Rocks Rocks have it !
48% Igneous Rocks Rocks have it !
2.5 Appearance
Veined or Pebbled
Shiny
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Bathrooms, Countertops, Decorative Aggregates, Entryways, Flooring, Homes, Hotels, Interior Decoration, Kitchens, Stair Treads
Decorative Aggregates, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
Garden Decoration
3.1.3 Other Architectural Uses
Curbing
Not Yet Used
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Building houses or walls
Arrowheads, Cutting Tool, Knives, Scrapers, Spear Points
3.2.2 Medical Industry
Not Yet Used
Surgery
3.3 Antiquity Uses
Artifacts, Monuments, Sculpture
Artifacts, Jewellery
3.4 Other Uses
3.4.1 Commercial Uses
Curling, Gemstone, Laboratory bench tops, Soil Conditioner, Tombstones
Creating Artwork, Mirror, Used in aquariums
4 Types
4.1 Types
Not Available
Fireworks Obsidian, Mahogany, Sheen Obsidian, Snowflake obsidian and Velvet Peacock Obsidian
4.2 Features
Clasts are smooth to touch
Blocks negativity, Helps to protect against depression
4.3 Archaeological Significance
4.3.1 Monuments
Used
Not Yet Used
4.3.2 Famous Monuments
Data Not Available
Not Applicable
4.3.3 Sculpture
Used
Not Yet Used
4.3.4 Famous Sculptures
Data Not Available
Not Applicable
4.3.5 Pictographs
Not Used
Used
4.3.6 Petroglyphs
Not Used
Used
4.3.7 Figurines
Used
Not Yet Used
4.4 Fossils
Absent
Absent
5 Formation
5.1 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.
When the lava is released from volcano, it undergoes a very rapid cooling which freezes the mechanisms of crystallization. The result is a volcanic glass with a uniform smooth texture.
5.2 Composition
5.2.1 Mineral Content
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Quartz
Not Available
5.2.2 Compound Content
Aluminium Oxide, CaO, Carbon Dioxide, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Sulfur Dioxide, Titanium Dioxide
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
5.3 Transformation
5.3.1 Metamorphism
50% Metamorphic Rocks Rocks have it !
97% Igneous Rocks Rocks have it !
5.3.2 Types of Metamorphism
Not Applicable
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism
5.3.3 Weathering
65% Metamorphic Rocks Rocks have it !
99% Igneous Rocks Rocks have it !
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
5.3.5 Erosion
77% Metamorphic Rocks Rocks have it !
92% Igneous Rocks Rocks have it !
5.3.6 Types of Erosion
Chemical Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
6-7
5-5.5
6.1.2 Grain Size
Medium to Coarse Grained
Not Applicable
6.1.3 Fracture
Not Available
Conchoidal
6.1.4 Streak
White
White
6.1.5 Porosity
Very Less Porous
Very Less Porous
6.1.6 Luster
Vitreous
Vitreous
6.1.7 Compressive Strength
Flint
175.00 N/mm2
Rank: 13 (Overall)
0.15 N/mm2
Rank: 33 (Overall)
Obsidian
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6.1.8 Cleavage
Imperfect
Non-Existent
6.1.9 Toughness
Not Available
Not Available
6.1.10 Specific Gravity
2.8-3.0
2.6-2.7
6.1.11 Transparency
Opaque
Translucent
6.1.12 Density
3.06-3.33 g/cm3
2.6 g/cm3
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
Banded iron for..
0.14 kJ/Kg K
Rank: 26 (Overall)
0.92 kJ/Kg K
Rank: 10 (Overall)
Granulite
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6.2.2 Resistance
Heat Resistant, Wear Resistant
Heat Resistant, Impact Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam
Afghanistan, Indonesia, Japan, Russia
7.1.2 Africa
Angola, Egypt, Madagascar, Nigeria, South Africa
Kenya
7.1.3 Europe
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic, Venezuela
Greece, Hungary, Iceland, Italy, Turkey
7.1.4 Others
Not Yet Found
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
Canada, Mexico, USA
7.2.2 South America
Not Yet Found
Argentina, Chile, Ecuador, Peru
7.3 Deposits in Oceania Continent
7.3.1 Australia
Not Yet Found
New Zealand

Granulite vs Obsidian 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 Granulite and Obsidian Reserves. Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.. Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. 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 Granulite vs Obsidian information and Granulite vs Obsidian characteristics in the upcoming sections.

Granulite vs Obsidian 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. Granulite vs Obsidian characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Granulite and Properties of Obsidian. Learn more about Granulite vs Obsidian in the next section. The interior uses of Granulite include Bathrooms, Countertops, Decorative aggregates, Entryways, Flooring, Homes, Hotels, Interior decoration, Kitchens and Stair treads whereas the interior uses of Obsidian include Decorative aggregates and Interior decoration. Due to some exceptional properties of Granulite and Obsidian, they have various applications in construction industry. The uses of Granulite in construction industry include As dimension stone, Building houses or walls and that of Obsidian include Arrowheads, Cutting tool, Knives, Scrapers, Spear points.

More about Granulite and Obsidian

Here you can know more about Granulite and Obsidian. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Granulite and Obsidian consists of mineral content and compound content. The mineral content of Granulite includes Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Quartz and mineral content of Obsidian is not available. You can also check out the list of all Metamorphic Rocks. When we have to compare Granulite vs Obsidian, the texture, color and appearance plays an important role in determining the type of rock. Granulite is available in black, brown colors whereas, Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. Appearance of Granulite is Veined or Pebbled and that of Obsidian is Shiny. Properties of rock is another aspect for Granulite vs Obsidian. The hardness of Granulite is 6-7 and that of Obsidian is 5-5.5. The types of Granulite are Not Available whereas types of Obsidian are Fireworks Obsidian, Mahogany, Sheen Obsidian, Snowflake obsidian and Velvet Peacock Obsidian. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Granulite and Obsidian is white. The specific heat capacity of Granulite is 0.14 kJ/Kg K and that of Obsidian is 0.92 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Granulite is heat resistant, wear resistant whereas Obsidian is heat resistant, impact resistant.