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Schist Rock



Definition

Definition
Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation

History

Origin
-

Discoverer
Unknown

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

Class
Metamorphic Rocks

Sub-Class
Durable Rock, Medium Hardness Rock

Family

Group
-

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

Texture

Texture
Foliated, Platy

Color
Black, Blue, Brown, Dark Brown, Green, Grey, Silver

Maintenance
Less

Durability
Durable

Water Resistant
Yes

Scratch Resistant
No

Stain Resistant
No

Wind Resistant
No

Acid Resistant
No

Appearance
Layered and Shiny

Uses

Architecture

Interior Uses
Decorative Aggregates, Floor Tiles, Interior Decoration

Exterior Uses
Garden Decoration, Paving Stone

Other Architectural Uses
-

Industry

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, for Road Aggregate, Roadstone

Medical Industry
-

Antiquity Uses
Artifacts

Other Uses

Commercial Uses
Used in aquariums, Writing Slates

Types

Types
Mica Schists, Calc-Silicate Schists, Graphite Schists, Blueschists, Whiteschists, Greenschists, Hornblende Schist, Talc Schist, Chlorite Schist, Garnet Schist, Glaucophane schist.

Features
Easily splits into thin plates, Smooth to touch

Archaeological Significance

Monuments
-

Famous Monuments
-

Sculpture
-

Famous Sculptures
-

Pictographs
-

Petroglyphs
-

Figurines
-

Fossils
Absent

Formation

Formation
Schist formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.

Composition

Mineral Content
Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc

Compound Content
CaO, Carbon Dioxide, MgO

Transformation

Metamorphism
No

Types of Metamorphism
-

Weathering
Yes

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion
Yes

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties

Physical Properties

Hardness
3.5-4

Grain Size
Medium to Fine Coarse Grained

Fracture
Conchoidal

Streak
White

Porosity
Highly Porous

Luster
Shiny

Compressive Strength
150.00 N/mm2 22

Cleavage
Slaty

Toughness
1.5

Specific Gravity
2.5-2.9

Transparency
Opaque

Density
2.8-2.9 g/cm3

Thermal Properties

Specific Heat Capacity
0.70 kJ/Kg K 24

Resistance
Impact Resistant, Pressure Resistant, Water Resistant

Reserves

Deposits in Eastern Continents

Asia
Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam

Africa
Egypt, Ethiopia, Morocco, Nigeria, South Africa

Europe
Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland

Others
-

Deposits in Western Continents

North America
Canada, Costa Rica, Cuba, Mexico, Panama, USA

South America
Brazil, Colombia, Guyana

Deposits in Oceania Continent

Australia
New South Wales, New Zealand, Queensland

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Metamorphic Rocks

Information about Schist

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 Schist Uses. We have provided you with all information about Schist rock here. Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation. Schist is available in black, blue, brown, dark brown, green, grey, silver colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Schist is white. Get to know more about Schist rock and characteristics of Schist rock in the next sections.

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