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Blueschist and Hawaiite


Hawaiite and Blueschist


Definition

Definition
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature   
Hawaiite is volcanic rock that resembles basalt. It is an olivine basalt with intermediate composition between alkali olivine and mugearite   

History
  
  

Origin
USA   
Hawaii Islands   

Discoverer
Edgar Bailey   
Joseph Iddings   

Etymology
From French schiste, Greek skhistos i.e. split   
From Hawaii Islands   

Class
Metamorphic Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Volcanic   

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

Texture

Texture
Foliated   
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular   

Color
Blue, Bluish - Grey, Purple, Shades of Blue   
Black, Brown, Light to Dark Grey   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
No   

Wind Resistant
No   
Yes   

Acid Resistant
No   
No   

Appearance
Dull and Banded   
Dull and Soft   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Not Yet Used   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone   
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments, Sculpture   
Artifacts   

Other Uses
  
  

Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Tombstones   
Creating Artwork, Sea Defence   

Types

Types
Not Available   
Not Available   

Features
Has High structural resistance against erosion and climate, Very fine grained rock   
Has High structural resistance against erosion and climate, Very fine grained rock   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Data Not Available   
Easter Island in the Polynesian Triangle, Pacific Ocean   

Sculpture
Used   
Not Yet Used   

Famous Sculptures
Data Not Available   
Not Applicable   

Pictographs
Used   
Used   

Petroglyphs
Used   
Used   

Figurines
Used   
Not Yet Used   

Fossils
Absent   
Absent   

Formation

Formation
Blueschist forms due to the metamorphism of basalt and other rocks with similar composition at high pressures and low temperatures and approximately corresponding to a depth of 15 to 30 kilometers and 200 to 500 °C.   
Hawaiite is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes and reach the Earth's surface.   

Composition
  
  

Mineral Content
Albite, Chlorite, Epidote, Garnet, Glaucophane, Lawsonite, Muscovite or Illite, Quartz   
Olivine, Plagioclase, Pyroxene   

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   

Transformation
  
  

Metamorphism
No   
Yes   

Types of Metamorphism
Not Applicable   
Impact Metamorphism   

Weathering
Yes   
Yes   

Types of Weathering
Mechanical Weathering   
Biological Weathering   

Erosion
Yes   
No   

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

Properties

Physical Properties
  
  

Hardness
3.5-4   
6   

Grain Size
Fine to Medium Grained   
Not Applicable   

Fracture
Conchoidal   
Conchoidal   

Streak
White to Grey   
Not Available   

Porosity
Highly Porous   
Less Porous   

Luster
Dull   
Not Available   

Compressive Strength
Not Available   
37.40 N/mm2   
28

Cleavage
Slaty   
Not Applicable   

Toughness
1.5   
Not Available   

Specific Gravity
3-3.2   
Not Available   

Transparency
Opaque   
Opaque   

Density
2.8-2.9 g/cm3   
Not Available   

Thermal Properties
  
  

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Japan, Turkey   
India, Russia   

Africa
Egypt, Ethiopia, South Africa   
South Africa   

Europe
France, Greece, Iceland   
Iceland   

Others
Not Yet Found   
Hawaii Islands   

Deposits in Western Continents
  
  

North America
USA   
Canada, USA   

South America
Not Yet Found   
Brazil   

Deposits in Oceania Continent
  
  

Australia
New Zealand   
Not Yet Found   

Summary >>
<< Reserves

All about Blueschist and Hawaiite Properties

Know all about Blueschist and Hawaiite properties here. All properties of rocks are important as they define the type of rock and its application. Blueschist belongs to Metamorphic Rocks while Hawaiite belongs to Igneous Rocks.Texture of Blueschist is Foliated whereas that of Hawaiite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Blueschist appears Dull and Banded and Hawaiite appears Dull and Soft. The luster of Blueschist is dull while that of Hawaiite is not available. Blueschist is available in blue, bluish - grey, purple, shades of blue colors whereas Hawaiite is available in black, brown, light to dark grey colors. The commercial uses of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones and that of Hawaiite are creating artwork, sea defence.

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