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Variolite
Variolite

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Variolite vs Quartzite

1 Definition
1.1 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
Quartzite is a non-foliated metamorphic rock that forms by the metamorphism of pure quartz Sandstone
1.2 History
1.2.1 Origin
France
Unknown
1.2.2 Discoverer
Unknown
Unknown
1.3 Etymology
From Latin varius, speckled, variegated
From quartz + -ite
1.4 Class
Igneous Rocks
Metamorphic Rocks
1.4.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Volcanic
Not Applicable
1.6 Other Categories
Opaque Rock
Medium Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
Foliated, Granular
2.2 Color
Black, Brown, Light to Dark Grey
Black, Blue, Brown, Green, Light Grey, Purple, White, Yellow
2.3 Maintenance
Less
Less
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
81% Igneous Rocks Rocks have it !
81% Metamorphic Rocks Rocks have it !
2.4.2 Scratch Resistant
86% Igneous Rocks Rocks have it !
65% Metamorphic Rocks Rocks have it !
2.4.3 Stain Resistant
66% Igneous Rocks Rocks have it !
42% Metamorphic Rocks Rocks have it !
2.4.4 Wind Resistant
49% Igneous Rocks Rocks have it !
19% Metamorphic Rocks Rocks have it !
2.4.5 Acid Resistant
48% Igneous Rocks Rocks have it !
15% Metamorphic Rocks Rocks have it !
2.5 Appearance
Dull and Soft
Lustrous
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Floor Tiles, Flooring, Homes, Hotels, Kitchens
Countertops, Decorative Aggregates, Flooring, Homes
3.1.2 Exterior Uses
Garden Decoration, Office Buildings
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone
Arrowheads, As Dimension Stone, Cement Manufacture, Construction Aggregate, Cutting Tool, for Road Aggregate, Making natural cement, Production of Glass and Ceramics, Rail Track Ballast, Roadstone
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts, Monuments, Sculpture
Artifacts, Jewellery, Monuments, Sculpture
3.4 Other Uses
3.4.1 Commercial Uses
Cemetery Markers, Creating Artwork
An Oil and Gas Reservoir, As armour rock for sea walls, Cemetery Markers, Commemorative Tablets, In aquifers, Laboratory bench tops, Petroleum reservoirs, Soil Conditioner, Source of Magnesia (MgO), Tombstones, Used in aquariums
4 Types
4.1 Types
Not Available
Not Available
4.2 Features
Has High structural resistance against erosion and climate, Very fine grained rock
Generally rough to touch, Is one of the oldest rock
4.3 Archaeological Significance
4.3.1 Monuments
Used
Used
4.3.2 Famous Monuments
Data Not Available
Data Not Available
4.3.3 Sculpture
Used
Used
4.3.4 Famous Sculptures
Data Not Available
Data Not Available
4.3.5 Pictographs
Used
Not Used
4.3.6 Petroglyphs
Used
Not Used
4.3.7 Figurines
Used
Used
4.4 Fossils
Absent
Absent
5 Formation
5.1 Formation
Variolites are a group of dark green basic igneous rocks that exhibit pale colored spots on weathered surfaces that give them a pockmarked appearance.
Quartzite forms from sandstone and the mineral quartz being put under extreme heat and pressure.
5.2 Composition
5.2.1 Mineral Content
Olivine, Plagioclase, Pyroxene
Chlorite, Epidote, Hematite, Kyanite, Magnetite, Muscovite or Illite, Quartz
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, MgO, Sodium Oxide, Silicon Dioxide
5.3 Transformation
5.3.1 Metamorphism
97% Igneous Rocks Rocks have it !
50% Metamorphic Rocks Rocks have it !
5.3.2 Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Regional Metamorphism
5.3.3 Weathering
99% Igneous Rocks Rocks have it !
65% Metamorphic 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 !
77% Metamorphic Rocks Rocks have it !
5.3.6 Types of Erosion
Not Applicable
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
6
6-7
6.1.2 Grain Size
Not Applicable
Medium Grained
6.1.3 Fracture
Conchoidal
Uneven, Splintery or Conchoidal
6.1.4 Streak
White to Grey
White
6.1.5 Porosity
Less Porous
Less Porous
6.1.6 Luster
Not Available
Vitreous
6.1.7 Compressive Strength
Flint
37.50 N/mm2
Rank: 27 (Overall)
115.00 N/mm2
Rank: 18 (Overall)
Obsidian
ADD ⊕
6.1.8 Cleavage
Not Available
Indiscernible
6.1.9 Toughness
2.3
1.9
6.1.10 Specific Gravity
2.8-3
2.6-2.8
6.1.11 Transparency
Opaque
Transparent to Translucent
6.1.12 Density
2.9-3.1 g/cm3
2.32-2.42 g/cm3
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
Banded iron for..
0.84 kJ/Kg K
Rank: 15 (Overall)
0.75 kJ/Kg K
Rank: 18 (Overall)
Granulite
ADD ⊕
6.2.2 Resistance
Heat Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
India, Russia
China, India, Israel, Russia, South Korea, Thailand, Turkey
7.1.2 Africa
South Africa
Ethiopia, Morocco, South Africa, Zimbabwe
7.1.3 Europe
Iceland
England, Italy, Norway, Scotland, Sweden, United Kingdom
7.1.4 Others
Not Yet Found
Greenland
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
Bahamas, Canada, USA
7.2.2 South America
Brazil
Brazil, Colombia, Venezuela
7.3 Deposits in Oceania Continent
7.3.1 Australia
Not Yet Found
New Zealand, Queensland, Western Australia

Variolite vs Quartzite 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 Variolite and Quartzite Reserves. 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. Quartzite is a non-foliated metamorphic rock that forms by the metamorphism of pure quartz Sandstone. 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 Variolite vs Quartzite information and Variolite vs Quartzite characteristics in the upcoming sections.

Variolite vs Quartzite 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. Variolite vs Quartzite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Variolite and Properties of Quartzite. Learn more about Variolite vs Quartzite in the next section. The interior uses of Variolite include Floor tiles, Flooring, Homes, Hotels and Kitchens whereas the interior uses of Quartzite include Countertops, Decorative aggregates, Flooring and Homes. Due to some exceptional properties of Variolite and Quartzite, they have various applications in construction industry. The uses of Variolite in construction industry include As dimension stone, Cobblestones, Rail track ballast, Roadstone and that of Quartzite include Arrowheads, As dimension stone, Cement manufacture, Construction aggregate, Cutting tool, For road aggregate, Making natural cement, Production of glass and ceramics, Rail track ballast, Roadstone.

More about Variolite and Quartzite

Here you can know more about Variolite and Quartzite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Variolite and Quartzite consists of mineral content and compound content. The mineral content of Variolite includes Olivine, Plagioclase, Pyroxene and mineral content of Quartzite includes Chlorite, Epidote, Hematite, Kyanite, Magnetite, Muscovite or Illite, Quartz. You can also check out the list of all Igneous Rocks. When we have to compare Variolite vs Quartzite, the texture, color and appearance plays an important role in determining the type of rock. Variolite is available in black, brown, light to dark grey colors whereas, Quartzite is available in black, blue, brown, green, light grey, purple, white, yellow colors. Appearance of Variolite is Dull and Soft and that of Quartzite is Lustrous. Properties of rock is another aspect for Variolite vs Quartzite. The hardness of Variolite is 6 and that of Quartzite is 6-7. The types of Variolite are Not Available whereas types of Quartzite are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Variolite is white to grey while that of Quartzite is white. The specific heat capacity of Variolite is 0.84 kJ/Kg K and that of Quartzite is 0.75 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Variolite is heat resistant, pressure resistant, wear resistant whereas Quartzite is heat resistant, impact resistant, pressure resistant, wear resistant.