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Definition

Definition
Essexite which is also known as nepheline monzogabbro, is a dark gray or black holocrystalline plutonic Iigneous Rock

History

Origin
USA

Discoverer
Unknown

Etymology
From the locality in Essex County, Massachusetts,US

Class
Igneous Rocks

Sub-Class
Durable Rock, Hard Rock

Family

Group
Plutonic

Other Categories
Fine Grained Rock, Opaque Rock

Texture

Texture
Granular

Color
Dark Grey to Black

Maintenance
Less

Durability
Durable

Water Resistant
Yes

Scratch Resistant
Yes

Stain Resistant
Yes

Wind Resistant
Yes

Acid Resistant
No

Appearance
Banded

Uses

Architecture

Interior Uses
Decorative Aggregates, Homes, Interior Decoration

Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone

Other Architectural Uses
Curbing

Industry

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

Medical Industry
-

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses
Cemetery Markers, Commemorative Tablets, Jewelry, Sea Defence, Tombstones

Types

Types
Intermediate volcanic rock

Features
Is one of the oldest rock, Smooth to touch

Archaeological Significance

Monuments
-

Famous Monuments
-

Sculpture
-

Famous Sculptures
-

Pictographs
-

Petroglyphs
-

Figurines
-

Fossils
Absent

Formation

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.

Composition

Mineral Content
Augite, Feldspar, Hornblende, Nepheline, Olivine, Plagioclase, Pyroxene

Compound Content
Aluminium Oxide, Ba, Ca, Cs, Potassium, Rb, Sodium, Sr

Transformation

Metamorphism
Yes

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism

Weathering
Yes

Types of Weathering
Biological Weathering, Chemical Weathering

Erosion
Yes

Types of Erosion
Coastal Erosion, Glacier Erosion, Water Erosion

Properties

Physical Properties

Hardness
7

Grain Size
Fine Grained

Fracture
Conchoidal

Streak
Black

Porosity
Highly Porous

Luster
-

Compressive Strength
120.00 N/mm2 26

Cleavage
-

Toughness
1.6

Specific Gravity
-9999

Transparency
Opaque

Density
-9999 g/cm3

Thermal Properties

Specific Heat Capacity
0.79 kJ/Kg K 17

Resistance
Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia
India, Russia

Africa
South Africa

Europe
Germany, Greece, Italy, Scotland, Turkey

Others
Greenland

Deposits in Western Continents

North America
Canada, USA

South America
Brazil, Colombia, Venezuela

Deposits in Oceania Continent

Australia
New Zealand, Queensland

Summary >>
<< Reserves

Igneous Rocks

Learn more about Properties of Essexite 

What is Essexite ? In this section, we will learn more about properties of Essexite  i.e. physical and thermal properties. Physical properties of Essexite  include Color, Streak, Hardness, Structure, Cleavage, Fracture, Luster, Specific Gravity etc. The strength of Essexite  is 120.00 N/mm2. Streak of Essexite  is black while its cleavage is . Luster of Essexite  is and its fracture is conchoidal. Essexite  is opaque in nature. Know all about Essexite , What is Essexite , its composition, features, facts and reserves in next sections.

Know about Composition of Essexite 

What is Essexite  composed of? Get to know about composition of Essexite  here. Essexite  definition gives information about the Formation of Essexite  and its composition.The composition of Essexite  can be further divided into mineral and compound content. The mineral content of Essexite  rock includes Augite, Feldspar, Hornblende, Nepheline, Olivine, Plagioclase, Pyroxene and The compound content of Essexite  rock includes Aluminium Oxide, Ba, Ca, Cs, Potassium, Rb, Sodium, Sr. Almost all rocks undergo transformation process. Know all about Essexite  rock in next section.

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