Definition
Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.
  
A water-soluble mineral sediment resulting from concentration and crystallization by evaporation from an aqueous solution
  
History
  
  
Origin
Indonesia
  
USA
  
Discoverer
Cornish Gossen
  
Usiglio
  
Etymology
From Cornish gossen from gos, blood from Old Cornish guit
  
From a sediment left after the evaporation
  
Class
Metamorphic Rocks
  
Sedimentary Rocks
  
Sub-Class
Durable Rock, Medium Hardness Rock
  
Durable Rock, Soft Rock
  
Family
  
  
Group
Not Applicable
  
Not Applicable
  
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
  
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
  
Texture
Rough, Sandy
  
Earthy
  
Color
Brown, Brown- Black, Gold, Green, Rust
  
Colourless, Green, Grey, Silver, White
  
Maintenance
Less
  
Less
  
Durability
Durable
  
Durable
  
Water Resistant
Yes
  
Yes
  
Scratch Resistant
Yes
  
No
  
Stain Resistant
Yes
  
No
  
Wind Resistant
No
  
Yes
  
Acid Resistant
No
  
No
  
Appearance
Dull and Banded
  
Glassy, Vesicular and Foilated
  
Architecture
  
  
Interior Uses
Countertops, Decorative Aggregates, Interior Decoration
  
Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration
  
Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings
  
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
  
Other Architectural Uses
Curbing
  
Curbing
  
Industry
  
  
Construction Industry
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate
  
As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories
  
Medical Industry
Not Yet Used
  
Taken as a Supplement for Calcium or Magnesium
  
Antiquity Uses
Artifacts
  
Artifacts
  
Other Uses
  
  
Commercial Uses
Cemetery Markers, Commemorative Tablets, Gemstone
  
Used in the manufacture of Ceramic Powder, Used in the preparation of Sulfuric Acid and Silicon Diborite
  
Types
Translocated gossan and Leakage gossan
  
Not Available
  
Features
Clasts are smooth to touch, Easily splits into thin plates
  
Generally rough to touch, Splintery, Veined
  
Archaeological Significance
  
  
Monuments
Not Yet Used
  
Not Yet Used
  
Famous Monuments
Not Applicable
  
Not Applicable
  
Sculpture
Not Yet Used
  
Not Yet Used
  
Famous Sculptures
Not Applicable
  
Not Applicable
  
Pictographs
Used
  
Used
  
Petroglyphs
Used
  
Used
  
Figurines
Not Yet Used
  
Not Yet Used
  
Fossils
Absent
  
Present
  
Formation
Earth movements can cause rocks to be either deeply buried or squeezed and hence the rocks are heated and put under great pressure.
  
Evaporite is water-soluble mineral sediment which forms from concentration and crystallization by evaporation from an aqueous solution.
  
Composition
  
  
Mineral Content
Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon
  
Calcite, Cancrinite, Gypsum, Kyanite, Magnetite
  
Compound Content
Aluminium Oxide, CaO, Fe, FeO, Silicon Dioxide, Sulphur
  
CaMg(CO3)2, CaO, Calcium Sulfate, KCl, MgO, NaCl
  
Transformation
  
  
Metamorphism
No
  
Yes
  
Types of Metamorphism
Not Applicable
  
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism
  
Weathering
No
  
No
  
Types of Weathering
Not Applicable
  
Not Applicable
  
Erosion
Yes
  
No
  
Types of Erosion
Chemical Erosion, Sea Erosion, Wind Erosion
  
Not Applicable
  
Physical Properties
  
  
Hardness
4-5
  
2-3
  
Grain Size
Fine to Medium Grained
  
Medium to Fine Coarse Grained
  
Fracture
Conchoidal
  
Conchoidal
  
Streak
White to Grey
  
White
  
Porosity
Highly Porous
  
Less Porous
  
Luster
Metallic
  
Subvitreous to Dull
  
Compressive Strength
Not Available
  
225.00 N/mm
2
  
7
Cleavage
Not Available
  
Perfect
  
Toughness
Not Available
  
Not Available
  
Specific Gravity
2.0
  
2.86-2.99
  
Transparency
Opaque
  
Translucent
  
Density
Not Available
  
2.8-2.9 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
0.24 kJ/Kg K
  
24
0.92 kJ/Kg K
  
10
Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
  
Heat Resistant, Pressure Resistant
  
Deposits in Eastern Continents
  
  
Asia
China, India, Indonesia, Russia, Singapore, South Korea
  
Not Available
  
Africa
Cape Verde, Ethiopia, Ghana, South Africa, Western Africa
  
Not Available
  
Europe
Albania, France, Germany, Great Britain, United Kingdom
  
United Kingdom
  
Others
Not Yet Found
  
Not Yet Found
  
Deposits in Western Continents
  
  
North America
Canada, USA
  
USA
  
South America
Brazil, Colombia, Ecuador
  
Colombia, Paraguay
  
Deposits in Oceania Continent
  
  
Australia
New South Wales, South Australia, Western Australia
  
Central Australia, Western Australia
  
Gossan vs Evaporite 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 Evaporite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Gossan and Properties of Evaporite. Learn more about Gossan vs Evaporite in the next section. The interior uses of Gossan include Countertops, Decorative aggregates and Interior decoration whereas the interior uses of Evaporite include Decorative aggregates, Entryways, Flooring, Homes and Interior decoration. Due to some exceptional properties of Gossan and Evaporite, 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 Evaporite include As a flux in the production of steel and pig iron, As a sintering agent in steel industry to process iron ore, As dimension stone, Cement manufacture, For road aggregate, Making natural cement, Manufacture of magnesium and dolomite refractories.
More about Gossan and Evaporite
Here you can know more about Gossan and Evaporite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Gossan and Evaporite 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 Evaporite includes Calcite, Cancrinite, Gypsum, Kyanite, Magnetite. You can also check out the list of all Metamorphic Rocks. When we have to compare Gossan vs Evaporite, 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, Evaporite is available in colourless, green, grey, silver, white colors. Appearance of Gossan is Dull and Banded and that of Evaporite is Glassy, Vesicular and Foilated. Properties of rock is another aspect for Gossan vs Evaporite. The hardness of Gossan is 4-5 and that of Evaporite is 2-3. The types of Gossan are Translocated gossan and Leakage gossan whereas types of Evaporite are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Gossan is white to grey while that of Evaporite is white. The specific heat capacity of Gossan is 0.24 kJ/Kg K and that of Evaporite 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.Gossan is heat resistant, impact resistant, pressure resistant whereas Evaporite is heat resistant, pressure resistant.