1 Definition
1.1 Definition
Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).
1.2 History
1.2.1 Origin
Brazil
1.2.2 Discoverer
Unknown
1.3 Etymology
from French néphéline, from Greek nephelē
1.4 Class
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Plutonic
1.6 Other Categories
Fine Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Aphanitic
2.2 Color
Black, Brown, Colourless, Green, Grey, White
2.3 Maintenance
Less
2.4 Durability
Durable
2.4.1 Water Resistant
✔
✘
81% - Igneous Rocks Rocks have it !
▶
2.4.2 Scratch Resistant
✔
✘
86% - Igneous Rocks Rocks have it !
▶
2.4.3 Stain Resistant
✔
✘
66% - Igneous Rocks Rocks have it !
▶
2.4.4 Wind Resistant
✔
✘
49% - Igneous Rocks Rocks have it !
▶
2.4.5 Acid Resistant
✔
✘
48% - Igneous Rocks Rocks have it !
▶
2.5 Appearance
Skeletal
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Homes, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
3.1.3 Other Architectural Uses
Curbing
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate
3.2.2 Medical Industry
Not Yet Used
3.3 Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines
3.4 Other Uses
3.4.1 Commercial Uses
Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)
4 Types
4.1 Types
Peralkaline Nephelinite
4.2 Features
Host Rock for Lead
4.3 Archaeological Significance
4.3.1 Monuments
Used
4.3.2 Famous Monuments
Data Not Available
4.3.3 Sculpture
Used
4.3.4 Famous Sculptures
Data Not Available
4.3.5 Pictographs
Not Used
4.3.6 Petroglyphs
Not Used
4.3.7 Figurines
Used
4.4 Fossils
Absent
5 Formation
5.1 Formation
Nephelinite 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.
5.2 Composition
5.2.1 Mineral Content
Clinopyroxene, Nepheline, Plagioclase
5.2.2 Compound Content
Ca, CaO, Carbon, Cl, MgO
5.3 Transformation
5.3.1 Metamorphism
✔
✘
97% - Igneous Rocks Rocks have it !
▶
5.3.2 Types of Metamorphism
Contact Metamorphism
5.3.3 Weathering
✔
✘
99% - Igneous Rocks Rocks have it !
▶
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
5.3.5 Erosion
✔
✘
92% - Igneous Rocks Rocks have it !
▶
5.3.6 Types of Erosion
Chemical Erosion, Water Erosion, Wind Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
6.1.2 Grain Size
Fine Grained
6.1.3 Fracture
Flat
6.1.4 Streak
White
6.1.5 Porosity
Less Porous
6.1.6 Luster
Vitreous to Metallic
6.1.7 Compressive Strength
35.00 N/mm2
Rank: 29 (Overall) ▶
0.15
450
6.1.8 Cleavage
Imperfect
6.1.9 Toughness
2.7
6.1.10 Specific Gravity
6.1.11 Transparency
Opaque
6.1.12 Density
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
0.88 kJ/Kg K
Rank: 13 (Overall) ▶
0.14
3.2
6.2.2 Resistance
Heat Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
Japan
7.1.2 Africa
Rwanda, Tanzania
7.1.3 Europe
Not Yet Found
7.1.4 Others
Hawaii Islands
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
7.2.2 South America
Colombia
7.3 Deposits in Oceania Continent
7.3.1 Australia
Not Yet Found