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Felsite
Felsite

Variolite
Variolite



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Felsite vs Variolite

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1 Definition
1.1 Definition
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
Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance
1.2 History
1.2.1 Origin
Unknown
France
1.2.2 Discoverer
Unknown
Unknown
1.3 Etymology
From English feldspar and -ite
From Latin varius, speckled, variegated
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Volcanic
Volcanic
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Opaque Rock
2 Texture
2.1 Texture
Arborescent Patterned, Vitreous
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
2.2 Color
Black, Blue, Brown, Green, Orange, Red, Tan, Yellow
Black, Brown, Light to Dark Grey
2.3 Maintenance
Less
Less
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
81% Igneous Rocks Rocks have it !
81% Igneous Rocks Rocks have it !
2.4.2 Scratch Resistant
86% Igneous Rocks Rocks have it !
86% Igneous Rocks Rocks have it !
2.4.3 Stain Resistant
66% Igneous Rocks Rocks have it !
66% Igneous Rocks Rocks have it !
2.4.4 Wind Resistant
49% Igneous Rocks Rocks have it !
49% Igneous Rocks Rocks have it !
2.4.5 Acid Resistant
48% Igneous Rocks Rocks have it !
48% Igneous Rocks Rocks have it !
2.5 Appearance
Layered, Banded, Veined and Shiny
Dull and Soft
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Flooring, Interior Decoration
Floor Tiles, Flooring, Homes, Hotels, Kitchens
3.1.2 Exterior Uses
Paving Stone, Garden Decoration
Garden Decoration, Office Buildings
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
Arrowheads, Cutting Tool, Knives, Scrapers, Spear Points
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone
3.2.2 Medical Industry
Surgery
Not Yet Used
3.3 Antiquity Uses
Artifacts
Artifacts, Monuments, Sculpture
3.4 Other Uses
3.4.1 Commercial Uses
Mirror, Jewelry
Cemetery Markers, Creating Artwork
4 Types
4.1 Types
Not Available
Not Available
4.2 Features
Available in Lots of Colors and Patterns, Clasts are smooth to touch, Splintery, Very fine grained rock
Has High structural resistance against erosion and climate, Very fine grained rock
4.3 Archaeological Significance
4.3.1 Monuments
Not Yet Used
Used
4.3.2 Famous Monuments
Not Applicable
Data Not Available
4.3.3 Sculpture
Not Yet Used
Used
4.3.4 Famous Sculptures
Not Applicable
Data Not Available
4.3.5 Pictographs
Used
Used
4.3.6 Petroglyphs
Used
Used
4.3.7 Figurines
Not Yet Used
Used
4.4 Fossils
Absent
Absent
5 Formation
5.1 Formation
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.
Variolites are a group of dark green basic igneous rocks that exhibit pale colored spots on weathered surfaces that give them a pockmarked appearance.
5.2 Composition
5.2.1 Mineral Content
Feldspar, Iron Oxides
Olivine, Plagioclase, Pyroxene
5.2.2 Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon 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
97% Igneous Rocks Rocks have it !
97% Igneous Rocks Rocks have it !
5.3.2 Types of Metamorphism
Burial Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
5.3.3 Weathering
99% Igneous Rocks Rocks have it !
99% Igneous Rocks Rocks have it !
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
5.3.5 Erosion
92% Igneous Rocks Rocks have it !
92% Igneous Rocks Rocks have it !
5.3.6 Types of Erosion
Chemical Erosion, Glacier Erosion, Water Erosion
Not Applicable
6 Properties
6.1 Physical Properties
6.1.1 Hardness
5-5.5
6
6.1.2 Grain Size
Fine Grained
Not Applicable
6.1.3 Fracture
Conchoidal
Conchoidal
6.1.4 Streak
White
White to Grey
6.1.5 Porosity
Very Less Porous
Less Porous
6.1.6 Luster
Vitreous
Not Available
6.1.7 Compressive Strength
Flint
0.15 N/mm2
Rank: 33 (Overall)
37.50 N/mm2
Rank: 27 (Overall)
Obsidian
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6.1.8 Cleavage
Non-Existent
Not Available
6.1.9 Toughness
Not Available
2.3
6.1.10 Specific Gravity
2.6-2.7
2.8-3
6.1.11 Transparency
Translucent
Opaque
6.1.12 Density
2.6 g/cm3
2.9-3.1 g/cm3
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
Banded iron for..
0.92 kJ/Kg K
Rank: 10 (Overall)
0.84 kJ/Kg K
Rank: 15 (Overall)
Granulite
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6.2.2 Resistance
Heat Resistant, Impact Resistant
Heat Resistant, Pressure Resistant, Wear Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
Afghanistan, Indonesia, Japan, Russia
India, Russia
7.1.2 Africa
Kenya
South Africa
7.1.3 Europe
Greece, Hungary, Iceland, Italy, Turkey
Iceland
7.1.4 Others
Not Yet Found
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Canada, Mexico, USA
Canada, USA
7.2.2 South America
Argentina, Chile, Ecuador, Peru
Brazil
7.3 Deposits in Oceania Continent
7.3.1 Australia
New Zealand
Not Yet Found

Felsite vs Variolite 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 Felsite and Variolite Reserves. 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. Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance. 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 Felsite vs Variolite information and Felsite vs Variolite characteristics in the upcoming sections.

Felsite vs Variolite 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. Felsite vs Variolite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Felsite and Properties of Variolite. Learn more about Felsite vs Variolite in the next section. The interior uses of Felsite include Decorative aggregates, Flooring and Interior decoration whereas the interior uses of Variolite include Floor tiles, Flooring, Homes, Hotels and Kitchens. Due to some exceptional properties of Felsite and Variolite, they have various applications in construction industry. The uses of Felsite in construction industry include Arrowheads, Cutting tool, Knives, Scrapers, Spear points and that of Variolite include As dimension stone, Cobblestones, Rail track ballast, Roadstone.

More about Felsite and Variolite

Here you can know more about Felsite and Variolite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Felsite and Variolite consists of mineral content and compound content. The mineral content of Felsite includes Feldspar, Iron Oxides and mineral content of Variolite includes Olivine, Plagioclase, Pyroxene. You can also check out the list of all Igneous Rocks. When we have to compare Felsite vs Variolite, the texture, color and appearance plays an important role in determining the type of rock. Felsite is available in black, blue, brown, green, orange, red, tan, yellow colors whereas, Variolite is available in black, brown, light to dark grey colors. Appearance of Felsite is Layered, Banded, Veined and Shiny and that of Variolite is Dull and Soft. Properties of rock is another aspect for Felsite vs Variolite. The hardness of Felsite is 5-5.5 and that of Variolite is 6. The types of Felsite are Not Available whereas types of Variolite are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Felsite is white while that of Variolite is white to grey. The specific heat capacity of Felsite is 0.92 kJ/Kg K and that of Variolite is 0.84 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Felsite is heat resistant, impact resistant whereas Variolite is heat resistant, pressure resistant, wear resistant.

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