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Definition

Definition
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature

History

Origin
USA

Discoverer
Edgar Bailey

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

Class
Metamorphic Rocks

Sub-Class
Durable Rock, Medium Hardness Rock

Family

Group
-

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

Texture

Texture
Foliated

Color
Blue, Bluish - Grey, Purple, Shades of Blue

Maintenance
Less

Durability
Durable

Water Resistant
No

Scratch Resistant
No

Stain Resistant
No

Wind Resistant
No

Acid Resistant
No

Appearance
Dull and Banded

Uses

Architecture

Interior Uses
Floor Tiles, Flooring, Homes, Hotels, Kitchens

Exterior Uses
Garden Decoration, Office Buildings

Other Architectural Uses
-

Industry

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

Medical Industry
-

Antiquity Uses
Artifacts, Monuments, Sculpture

Other Uses

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

Types

Types
Metamorphic rock

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

Archaeological Significance

Monuments
-

Famous Monuments
-

Sculpture
-

Famous Sculptures
-

Pictographs
-

Petroglyphs
-

Figurines
-

Fossils
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.

Composition

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

Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

Transformation

Metamorphism
No

Types of Metamorphism
-

Weathering
Yes

Types of Weathering
Mechanical Weathering

Erosion
Yes

Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness
3.5-4

Grain Size
Fine to Medium Grained

Fracture
Conchoidal

Streak
White to Grey

Porosity
Highly Porous

Luster
Dull

Compressive Strength
220.00 N/mm2 9

Cleavage
Slaty

Toughness
1.5

Specific Gravity
3-3.2

Transparency
Opaque

Density
2.8-2.9 g/cm3

Thermal Properties

Specific Heat Capacity
0.84 kJ/Kg K 15

Resistance
Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia
Japan, Turkey

Africa
Egypt, Ethiopia, South Africa

Europe
France, Greece, Iceland

Others
-

Deposits in Western Continents

North America
USA

South America
-

Deposits in Oceania Continent

Australia
New Zealand

Definition >>
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Igneous Rocks

Information about Blueschist

Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Blueschist Uses. We have provided you with all information about Blueschist rock here. Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature. Blueschist is available in blue, bluish - grey, purple, shades of blue colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Blueschist is white to grey. Get to know more about Blueschist rock and characteristics of Blueschist rock in the next sections.

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