1 Definition
1.1 Definition
Nepheline Syenite is a holocrystalline plutonic rock resembling syenite but containing nepheline and lacking quartz
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
1.2 History
1.2.1 Origin
1.2.2 Discoverer
1.3 Etymology
From origin of a Palaeozoic nepheline syenite from northern Shanxi Province, China
From 17th century, because of its greasy feel and use like a soap
1.4 Class
Igneous Rocks
Metamorphic Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
2 Texture
2.1 Texture
2.2 Color
Brown, Buff, Cream, Green, Grey, Pink, White
Black, Black to Grey, Green, Grey
2.3 Maintenance
2.4 Durability
2.4.1 Water Resistant
2.4.2 Scratch Resistant
2.4.3 Stain Resistant
2.4.4 Wind Resistant
2.4.5 Acid Resistant
2.5 Appearance
Banded and Foilated
Dull, Banded and Foilated
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Countertops, Decorative Aggregates, Flooring, Homes, Interior Decoration
Bathrooms, Decorative Aggregates, Homes, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
As Facing Stone, Garden Decoration
3.1.3 Other Architectural Uses
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics
Manufacture of Magnesium and Dolomite Refractories
3.2.2 Medical Industry
Not Yet Used
Taken as a Supplement for Calcium or Magnesium
1.1 Antiquity Uses
Artifacts, Monuments, Sculpture
Artifacts, Jewellery, Monuments, Sculpture
1.3 Other Uses
1.3.1 Commercial Uses
Cemetery Markers, Creating Artwork
Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Production of Lime, Source of Magnesia (MgO)
2 Types
2.1 Types
Borolanite and Litchfieldite
Not Available
2.2 Features
Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, Is one of the oldest rock
Host Rock for Lead
2.3 Archaeological Significance
2.3.1 Monuments
2.4.1 Famous Monuments
Data Not Available
Christ the Redeemer in Rio de Janeiro, Stonehenge in English county of Wiltshire
2.5.1 Sculpture
2.5.3 Famous Sculptures
Data Not Available
Data Not Available
2.6.2 Pictographs
2.7.1 Petroglyphs
3.1.1 Figurines
3.3 Fossils
4 Formation
4.1 Formation
Nepheline Syenites are formed due to alkaline igneous activities and are generally formed in thick continental crustal areas or in Cordilleran subduction zones.
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.
4.3 Composition
4.3.1 Mineral Content
Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite
Albite, Apatite, Biotite, Calcite, Carbonate, Clay Minerals, Hornblende, Ilmenite, Micas, Plagioclase, Pyroxene, Quartz
4.3.3 Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
CaO, Mg, MgO
4.4 Transformation
4.4.1 Metamorphism
4.4.3 Types of Metamorphism
Burial Metamorphism, Impact Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
4.4.5 Weathering
4.4.7 Types of Weathering
Biological Weathering, Chemical Weathering
Not Applicable
4.4.8 Erosion
4.5.1 Types of Erosion
Chemical Erosion
Not Applicable
6 Properties
6.2 Physical Properties
6.2.2 Hardness
9.1.2 Grain Size
Fine Grained
Fine Grained
9.1.3 Fracture
Conchoidal to Uneven
Conchoidal
9.1.4 Streak
9.1.5 Porosity
9.1.6 Luster
9.1.7 Compressive Strength
150.00 N/mm2225.00 N/mm2
0.15
450
9.1.14 Cleavage
9.1.15 Toughness
9.1.16 Specific Gravity
9.1.17 Transparency
Translucent to Opaque
Opaque
9.1.19 Density
2.6 g/cm32.8-2.9 g/cm3
0
1400
9.2 Thermal Properties
9.2.1 Specific Heat Capacity
9.3.2 Resistance
Heat Resistant, Impact Resistant, Wear Resistant
Heat Resistant, Pressure Resistant
10 Reserves
10.1 Deposits in Eastern Continents
10.1.1 Asia
Indonesia, Iran, Russia, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Turkmenistan, Vietnam
China, India, Indonesia, Japan, North Korea, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Tajikistan, Thailand
10.1.2 Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
Egypt, Ethiopia, Ghana, South Africa, Western Africa
10.1.3 Europe
Andorra, Finland, France, Great Britain, Italy, Norway, Portugal, Spain, Sweden
Austria, England, Finland, France, Germany, Greece, Spain, Sweden, Switzerland, United Kingdom
10.1.4 Others
10.2 Deposits in Western Continents
10.2.1 North America
10.2.2 South America
Brazil, Chile, Colombia, Uruguay, Venezuela
Colombia
10.3 Deposits in Oceania Continent
10.3.1 Australia
New Zealand, Queensland, South Australia, Tasmania, Western Australia
Central Australia, New Zealand, Queensland