Definition
Teschenite is coarse- to fine-grained, dark-coloured intrusive igneous rock that usually occurs in sills, dikes and irregular masses and is always altered to some extent
  
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
  
History
  
  
Origin
Scotland
  
USA
  
Discoverer
Unknown
  
Unknown
  
Etymology
From its occurrence near Teschen. now known as Cieszyn, Pol., Scotland
  
From 17th century, because of its greasy feel and use like a soap
  
Class
Igneous Rocks
  
Metamorphic Rocks
  
Sub-Class
Durable Rock, Hard Rock
  
Durable Rock, Soft Rock
  
Family
  
  
Group
Plutonic
  
Not Applicable
  
Other Categories
Coarse Grained Rock, Opaque Rock
  
Fine Grained Rock, Opaque Rock
  
Texture
Phaneritic
  
Polished
  
Color
Dark Grey to Black
  
Black, Black to Grey, Green, Grey
  
Maintenance
Less
  
Less
  
Durability
Durable
  
Durable
  
Water Resistant
Yes
  
Yes
  
Scratch Resistant
Yes
  
No
  
Stain Resistant
Yes
  
No
  
Wind Resistant
Yes
  
No
  
Acid Resistant
Yes
  
No
  
Appearance
Veined and Shiny
  
Dull, Banded and Foilated
  
Architecture
  
  
Interior Uses
Countertops, Decorative Aggregates, Entryways, Homes, Interior Decoration
  
Bathrooms, Decorative Aggregates, Homes, Interior Decoration
  
Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings
  
As Facing Stone, Garden Decoration
  
Other Architectural Uses
Curbing
  
Curbing
  
Industry
  
  
Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate
  
Manufacture of Magnesium and Dolomite Refractories
  
Medical Industry
Not Yet Used
  
Taken as a Supplement for Calcium or Magnesium
  
Antiquity Uses
Artifacts, Sculpture
  
Artifacts, Jewellery, Monuments, Sculpture
  
Other Uses
  
  
Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork, Laboratory bench tops, Jewelry, Sea Defence, Tombstones
  
Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Production of Lime, Source of Magnesia (MgO)
  
Types
Not Available
  
Not Available
  
Features
Smooth to touch
  
Host Rock for Lead
  
Archaeological Significance
  
  
Monuments
Used
  
Used
  
Famous Monuments
Data Not Available
  
Christ the Redeemer in Rio de Janeiro, Stonehenge in English county of Wiltshire
  
Sculpture
Used
  
Used
  
Famous Sculptures
Data Not Available
  
Data Not Available
  
Pictographs
Not Used
  
Used
  
Petroglyphs
Not Used
  
Used
  
Figurines
Used
  
Used
  
Fossils
Absent
  
Absent
  
Formation
Teschenite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.
  
Soapstone is a talc-schist, which is a type of metamorphic rock and it is largely composed of the mineral talc and is thus rich inmagnesium.
  
Composition
  
  
Mineral Content
Augite, Olivine, Plagioclase, Pyroxene
  
Albite, Apatite, Biotite, Calcite, Carbonate, Clay Minerals, Hornblende, Ilmenite, Micas, Plagioclase, Pyroxene, Quartz
  
Compound Content
Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide
  
CaO, Mg, MgO
  
Transformation
  
  
Metamorphism
Yes
  
Yes
  
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
  
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
  
Weathering
Yes
  
No
  
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
  
Not Applicable
  
Erosion
Yes
  
No
  
Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
  
Not Applicable
  
Physical Properties
  
  
Hardness
7
  
1
  
Grain Size
Coarse Grained
  
Fine Grained
  
Fracture
Conchoidal
  
Conchoidal
  
Streak
Black
  
Black
  
Porosity
Highly Porous
  
Less Porous
  
Luster
Not Available
  
Greasy
  
Compressive Strength
225.00 N/mm
2
  
7
225.00 N/mm
2
  
7
Cleavage
Not Available
  
Perfect
  
Toughness
1.6
  
1
  
Specific Gravity
2.86-2.87
  
2.86
  
Transparency
Opaque
  
Opaque
  
Density
2.7-3.3 g/cm3
  
2.8-2.9 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
Not Available
  
0.88 kJ/Kg K
  
13
Resistance
Impact Resistant, Pressure Resistant, Wear Resistant
  
Heat Resistant, Pressure Resistant
  
Deposits in Eastern Continents
  
  
Asia
India, Russia
  
China, India, Indonesia, Japan, North Korea, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Tajikistan, Thailand
  
Africa
South Africa
  
Egypt, Ethiopia, Ghana, South Africa, Western Africa
  
Europe
Germany, Greece, Italy, Scotland, Turkey
  
Austria, England, Finland, France, Germany, Greece, Spain, Sweden, Switzerland, United Kingdom
  
Others
Greenland
  
Not Yet Found
  
Deposits in Western Continents
  
  
North America
Canada, USA
  
Canada, USA
  
South America
Brazil, Colombia, Venezuela
  
Colombia
  
Deposits in Oceania Continent
  
  
Australia
New Zealand, Queensland
  
Central Australia, New Zealand, Queensland