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Essexite 
Essexite 

Comendite
Comendite



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Essexite 
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Comendite

Essexite  and Comendite

1 Definition
1.1 Definition
Essexite which is also known as nepheline monzogabbro, is a dark gray or black holocrystalline plutonic Iigneous Rock
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
1.2 History
1.2.1 Origin
USA
Italy
1.2.2 Discoverer
Unknown
Unknown
1.3 Etymology
From the locality in Essex County, Massachusetts,US
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Plutonic
Volcanic
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Medium Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Granular
Porphyritic
2.2 Color
Dark Grey to Black
Blue, Bluish - Grey
2.3 Maintenance
Less
Less
2.4 Durability
Durable
Durable
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
Foliated
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Homes, Interior Decoration
Countertops, Decorative Aggregates, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
As Building Stone, As Facing Stone, Garden Decoration
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate
Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Raw material for the manufacture of mortar
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines
Artifacts
3.4 Other Uses
3.4.1 Commercial Uses
Cemetery Markers, Commemorative Tablets, Jewelry, Sea Defence, Tombstones
Cemetery Markers
4 Types
4.1 Types
Not Available
Rhyolite
4.2 Features
Is one of the oldest rock, Smooth to touch
Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock
4.3 Archaeological Significance
4.3.1 Monuments
Used
Not Yet Used
4.3.2 Famous Monuments
Data Not Available
Not Applicable
4.3.3 Sculpture
Used
Not Yet Used
4.3.4 Famous Sculptures
Data Not Available
Not Applicable
4.3.5 Pictographs
Not Used
Not Used
4.3.6 Petroglyphs
Not Used
Not Used
4.3.7 Figurines
Used
Not Yet Used
4.4 Fossils
Absent
Absent
5 Formation
5.1 Formation
Essexite is a type of igneous rock, which is usually dark grey to black plutonic rock. For the formation of essexite, suitable magma with exact composition of K, Ba, Rb, Cs, Sr should be produced.
Comendite is a type of Igneous rock which is formed due to cooling and solidification of lava or magma. It may form 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
Augite, Feldspar, Hornblende, Nepheline, Olivine, Plagioclase, Pyroxene
Albite, Amphibole, Quartz
5.2.2 Compound Content
Aluminium Oxide, Ba, Ca, Cs, Potassium, Rb, Sodium, Sr
Al, Fe, Potassium Oxide
5.3 Transformation
5.3.1 Metamorphism
5.3.2 Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism
Cataclastic Metamorphism, Regional Metamorphism
5.3.3 Weathering
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
5.3.5 Erosion
5.3.6 Types of Erosion
Coastal Erosion, Glacier Erosion, Water Erosion
Coastal Erosion, Water Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
76-7
Coal
1 7
6.1.2 Grain Size
Fine Grained
Medium Grained
6.1.3 Fracture
Conchoidal
Pervasive
6.1.4 Streak
Black
Bluish Black
6.1.5 Porosity
Highly Porous
Highly Porous
6.1.6 Luster
Not Available
Dull
6.1.7 Compressive Strength
NA92.40 N/mm2
What Is Obsidian
0.15 450
6.1.8 Cleavage
Not Available
Not Available
6.1.9 Toughness
1.6
2
6.1.10 Specific Gravity
Not Available2.38
Granite
0 8.4
6.1.11 Transparency
Opaque
Opaque
6.1.12 Density
Not AvailableNot Available
Granite
0 1400
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
NANA
What Is Granulite
0.14 3.2
6.2.2 Resistance
Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
India, Russia
China
7.1.2 Africa
South Africa
East Africa
7.1.3 Europe
Germany, Greece, Italy, Scotland, Turkey
Italy
7.1.4 Others
Greenland
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
Not Yet Found
7.2.2 South America
Brazil, Colombia, Venezuela
Not Yet Found
7.3 Deposits in Oceania Continent
7.3.1 Australia
New Zealand, Queensland
Queensland

All about Essexite  and Comendite Properties

Know all about Essexite  and Comendite properties here. All properties of rocks are important as they define the type of rock and its application. Essexite  and Comendite belong to Igneous Rocks.Texture of Essexite  is Granular whereas that of Comendite is Porphyritic. Essexite  appears Banded and Comendite appears Foliated. The luster of Essexite  is not available while that of Comendite is dull. Essexite  is available in dark grey to black colors whereas Comendite is available in blue, bluish - grey colors. The commercial uses of Essexite  and Comendite are cemetery markers, commemorative tablets, jewelry, sea defence, tombstones.