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Gossan
Gossan

Variolite
Variolite



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Gossan vs Variolite

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1 Definition
1.1 Definition
Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.
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
Indonesia
France
1.2.2 Discoverer
Cornish Gossen
Unknown
1.3 Etymology
From Cornish gossen from gos, blood from Old Cornish guit
From Latin varius, speckled, variegated
1.4 Class
Metamorphic Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Not Applicable
Volcanic
1.6 Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Opaque Rock
2 Texture
2.1 Texture
Rough, Sandy
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
2.2 Color
Brown, Brown- Black, Gold, Green, Rust
Black, Brown, Light to Dark Grey
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
Dull and Banded
Dull and Soft
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Countertops, Decorative Aggregates, Interior Decoration
Floor Tiles, Flooring, Homes, Hotels, Kitchens
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings
Garden Decoration, Office Buildings
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts
Artifacts, Monuments, Sculpture
3.4 Other Uses
3.4.1 Commercial Uses
Cemetery Markers, Commemorative Tablets, Gemstone
Cemetery Markers, Creating Artwork
4 Types
4.1 Types
Translocated gossan and Leakage gossan
Not Available
4.2 Features
Clasts are smooth to touch, Easily splits into thin plates
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
Earth movements can cause rocks to be either deeply buried or squeezed and hence the rocks are heated and put under great pressure.
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
Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon
Olivine, Plagioclase, Pyroxene
5.2.2 Compound Content
Aluminium Oxide, CaO, Fe, FeO, Silicon Dioxide, Sulphur
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, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
5.3.3 Weathering
65% Metamorphic Rocks Rocks have it !
99% Igneous Rocks Rocks have it !
5.3.4 Types of Weathering
Not Applicable
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, Sea Erosion, Wind Erosion
Not Applicable
6 Properties
6.1 Physical Properties
6.1.1 Hardness
4-5
6
6.1.2 Grain Size
Fine to Medium Grained
Not Applicable
6.1.3 Fracture
Conchoidal
Conchoidal
6.1.4 Streak
White to Grey
White to Grey
6.1.5 Porosity
Highly Porous
Less Porous
6.1.6 Luster
Metallic
Not Available
6.1.7 Compressive Strength
Flint
Not Available
Rank: N/A (Overall)
37.50 N/mm2
Rank: 27 (Overall)
Obsidian
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6.1.8 Cleavage
Not Available
Not Available
6.1.9 Toughness
Not Available
2.3
6.1.10 Specific Gravity
2.0
2.8-3
6.1.11 Transparency
Opaque
Opaque
6.1.12 Density
Not Available
2.9-3.1 g/cm3
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
Banded iron for..
0.24 kJ/Kg K
Rank: 24 (Overall)
0.84 kJ/Kg K
Rank: 15 (Overall)
Granulite
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6.2.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
Heat Resistant, Pressure Resistant, Wear Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
China, India, Indonesia, Russia, Singapore, South Korea
India, Russia
7.1.2 Africa
Cape Verde, Ethiopia, Ghana, South Africa, Western Africa
South Africa
7.1.3 Europe
Albania, France, Germany, Great Britain, United Kingdom
Iceland
7.1.4 Others
Not Yet Found
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
Canada, USA
7.2.2 South America
Brazil, Colombia, Ecuador
Brazil
7.3 Deposits in Oceania Continent
7.3.1 Australia
New South Wales, South Australia, Western Australia
Not Yet Found

Gossan 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 Gossan and Variolite Reserves. Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.. 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 Gossan vs Variolite information and Gossan vs Variolite characteristics in the upcoming sections.

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

More about Gossan and Variolite

Here you can know more about Gossan and Variolite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Gossan and Variolite consists of mineral content and compound content. The mineral content of Gossan includes Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon and mineral content of Variolite includes Olivine, Plagioclase, Pyroxene. You can also check out the list of all Metamorphic Rocks. When we have to compare Gossan vs Variolite, the texture, color and appearance plays an important role in determining the type of rock. Gossan is available in brown, brown- black, gold, green, rust colors whereas, Variolite is available in black, brown, light to dark grey colors. Appearance of Gossan is Dull and Banded and that of Variolite is Dull and Soft. Properties of rock is another aspect for Gossan vs Variolite. The hardness of Gossan is 4-5 and that of Variolite is 6. The types of Gossan are Translocated gossan and Leakage gossan 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 Gossan and Variolite is white to grey. The specific heat capacity of Gossan is 0.24 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.Gossan is heat resistant, impact resistant, pressure resistant whereas Variolite is heat resistant, pressure resistant, wear resistant.