Definition
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
Origin
USA
Tamil Nadu, India
Discoverer
Edgar Bailey
T. H. Holland
Etymology
From French schiste, Greek skhistos i.e. split
From Job Charnock, an administtrator of East India Company
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Group
Not Applicable
Plutonic
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
Texture
Foliated
Granular
Color
Blue, Bluish - Grey, Purple, Shades of Blue
Black, Grey, Orange, Pink, White
Durability
Durable
Durable
Appearance
Dull and Banded
Veined or Pebbled
Interior Uses
Floor Tiles, Flooring, Homes, Hotels, Kitchens
Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Homes, Hotels, Kitchens, Stair Treads
Exterior Uses
Garden Decoration, Office Buildings
As Building Stone, As Facing Stone, Bridges, Paving Stone, Garden Decoration, Office Buildings, Resorts
Other Architectural Uses
Not Yet Used
Curbing
Construction Industry
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone
As Dimension Stone
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Artifacts, Monuments, Sculpture
Artifacts, Monuments, Sculpture, Small Figurines
Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Tombstones
Curling, Gemstone, Laboratory bench tops, Tombstones
Types
Not Available
Enderbite
Features
Has High structural resistance against erosion and climate, Very fine grained rock
Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock
Archaeological Significance
Famous Monuments
Data Not Available
Data Not Available
Famous Sculptures
Data Not Available
Data Not Available
Pictographs
Used
Not Used
Petroglyphs
Used
Not Used
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.
Charnockite is an intrusive igneous rock which is very hard and is formed due to weathering of existing rocks.
Mineral Content
Albite, Chlorite, Epidote, Garnet, Glaucophane, Lawsonite, Muscovite or Illite, Quartz
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz
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
Types of Metamorphism
Not Applicable
Burial Metamorphism, Contact Metamorphism, Regional Metamorphism
Types of Weathering
Mechanical Weathering
Biological Weathering
Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Water Erosion, Wind Erosion
Grain Size
Fine to Medium Grained
Coarse Grained
Fracture
Conchoidal
Not Available
Streak
White to Grey
White
Porosity
Highly Porous
Very Less Porous
Luster
Dull
Not Available
Cleavage
Slaty
Not Available
Toughness
1.5
Not Available
Specific Gravity
3-3.2
Not Available
Transparency
Opaque
Opaque
Density
2.8-2.9 g/cm3
2.6 g/cm3
Resistance
Impact Resistant, Pressure Resistant
Heat Resistant, Wear Resistant
Deposits in Eastern Continents
Africa
Egypt, Ethiopia, South Africa
East Africa, Ethiopia, Madagascar, Morocco, Mozambique
Europe
France, Greece, Iceland
Albania, Romania, Scotland, United Kingdom
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
South America
Not Yet Found
Brazil, Colombia, Venezuela
Deposits in Oceania Continent
Australia
New Zealand
Central Australia, Western Australia
All about Blueschist and Charnockite Properties
Know all about Blueschist and Charnockite properties here. All properties of rocks are important as they define the type of rock and its application. Blueschist belongs to Metamorphic Rocks while Charnockite belongs to Igneous Rocks.Texture of Blueschist is Foliated whereas that of Charnockite is Granular. Blueschist appears Dull and Banded and Charnockite appears Veined or Pebbled. The luster of Blueschist is dull while that of Charnockite is not available. Blueschist is available in blue, bluish - grey, purple, shades of blue colors whereas Charnockite is available in black, grey, orange, pink, white colors. The commercial uses of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones and that of Charnockite are curling, gemstone, laboratory bench tops, tombstones.