Home

Igneous Rocks + -

Fossil Rocks + -

Metamorphic Rocks + -

Durable Rocks + -

Medium Grained Rocks + -

Compare Rocks


Jasperoid and Coquina


Coquina and Jasperoid


Definition

Definition
Jasperoid is a rare, peculiar type of metasomatic alteration of rocks   
Coquina is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically-sorted fragments of the shells of molluscs, trilobites, brachiopods, or other invertebrates   

History
  
  

Origin
USA   
European Foreland Basins   

Discoverer
Unknown   
Unknown   

Etymology
From silica, the main mineral content of Jasperoid   
From Concha (Latin)+ Coquina(Spanish) +conch(English)= Couquina (mid 19th century)   

Class
Sedimentary Rocks   
Sedimentary Rocks   

Sub-Class
Durable Rock, Medium Hardness Rock   
Durable Rock, Soft Rock   

Family
  
  

Group
Not Applicable   
Not Applicable   

Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock   
Coarse Grained Rock, Opaque Rock   

Texture

Texture
Earthy   
Clastic   

Color
Black, Brown, Colourless, Green, Grey, Pink, White   
Beige, Buff, Orange   

Maintenance
Less   
More   

Durability
Durable   
Non-Durable   

Water Resistant
Yes   
No   

Scratch Resistant
Yes   
No   

Stain Resistant
Yes   
No   

Wind Resistant
No   
No   

Acid Resistant
No   
No   

Appearance
Glassy or Pearly   
Layered, Banded, Veined and Shiny   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration   
Decorative Aggregates, Homes, Hotels, Interior Decoration   

Exterior Uses
As Building Stone, Garden Decoration, Office Buildings, Paving Stone   
Garden Decoration, Office Buildings   

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
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, Production of Glass and Ceramics, Serves as an Oil and Gas Reservoir rock   
Building houses or walls, Construction Aggregate   

Medical Industry
Taken as a Supplement for Calcium or Magnesium   
Not Yet Used   

Antiquity Uses
Artifacts, Jewellery, Monuments, Sculpture   
Artifacts, Monuments, Sculpture, Small Figurines   

Other Uses
  
  

Commercial Uses
An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner, Source of Magnesia (MgO)   
Creating Artwork   

Types

Types
Not Available   
Not Available   

Features
Host Rock for Lead, Traps for subsurface fluids like Oil and Natural Gas., Zinc and Copper Deposits   
Available in Lots of Colors and Patterns, Is one of the oldest rock   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Data Not Available   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Used   
Used   

Petroglyphs
Used   
Used   

Figurines
Used   
Used   

Fossils
Present   
Present   

Formation

Formation
Jasperoid is a rare and peculiar type of metasomatic alteration of rocks. It is formed by extreme alteration of wall rocks within a shear zone which may occur in sediments, andesites, trachytes and basalts.   
Coquina is a sedimentary rock which is formed when billions of small clam-like seashell, called Coquina, or cockleshell are die and hence are deposited, buried and turns into a rock when pressure is applied.   

Composition
  
  

Mineral Content
Clay Minerals, Pyrite, Quartz, Sulfides   
Apatite, Augite, Bronzite, Calcite, Chert, Chlorite, Clay Minerals, Epidote, Feldspar, Garnet, Micas, Muscovite or Illite   

Compound Content
NaCl, CaO, Carbon Dioxide, Magnesium Carbonate, MgO   
CaO, Carbon Dioxide, Iron(III) Oxide, MgO   

Transformation
  
  

Metamorphism
Yes   
No   

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism   
Not Applicable   

Weathering
No   
Yes   

Types of Weathering
Not Applicable   
Biological Weathering, Chemical Weathering, Mechanical Weathering   

Erosion
No   
Yes   

Types of Erosion
Not Applicable   
Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion   

Properties

Physical Properties
  
  

Hardness
3.5-4   
1-2   

Grain Size
Medium to Fine Coarse Grained   
Coarse Grained   

Fracture
Conchoidal   
Irregular   

Streak
White   
White   

Porosity
Less Porous   
Highly Porous   

Luster
Vitreous and Pearly   
Dull to Vitreous to Submetallic   

Compressive Strength
140.00 N/mm2   
15
Not Available   

Cleavage
Perfect   
Not Available   

Toughness
1   
Not Available   

Specific Gravity
2.8-3   
1.10-2.24   

Transparency
Transparent to Translucent   
Opaque   

Density
2.8-2.9 g/cm3   
2.8-2.9 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.92 kJ/Kg K   
10
Not Available   

Resistance
Heat Resistant, Pressure Resistant, Wear Resistant   
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India   
Not Yet Found   

Africa
Morocco, Namibia   
Not Yet Found   

Europe
Austria, Italy, Romania, Spain, Switzerland   
United Kingdom   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Mexico, USA   
USA   

South America
Brazil, Colombia   
Not Yet Found   

Deposits in Oceania Continent
  
  

Australia
New South Wales, Queensland, Yorke Peninsula   
Not Yet Found   

Summary >>
<< Reserves

All about Jasperoid and Coquina Properties

Know all about Jasperoid and Coquina properties here. All properties of rocks are important as they define the type of rock and its application. Jasperoid and Coquina belong to Sedimentary Rocks.Texture of Jasperoid is Earthy whereas that of Coquina is Clastic. Jasperoid appears Glassy or Pearly and Coquina appears Layered, Banded, Veined and Shiny. The luster of Jasperoid is vitreous and pearly while that of Coquina is dull to vitreous to submetallic. Jasperoid is available in black, brown, colourless, green, grey, pink, white colors whereas Coquina is available in beige, buff, orange colors. The commercial uses of Jasperoid are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo) and that of Coquina are creating artwork.

Compare Sedimentary Rocks

Fossil Rocks

Fossil Rocks

» More Fossil Rocks

Compare Sedimentary Rocks

» More Compare Sedimentary Rocks