Essexite

Skarn

Essexite and Skarn

Essexite

Skarn

Add ⊕

1 Definition

1.1 Definition

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

Skarns are formed during regional or contact metamorphism and from a variety of metasomatic processes involving fluids of magmatic, metamorphic, and/or marine origin

1.2 History

1.2.1 Origin

USA

USA, Australia

1.2.2 Discoverer

Unknown

Tornebohm

1.3 Etymology

From the locality in Essex County, Massachusetts,US

From an old Swedish mining term originally used to describe a type of silicate gangue or waste rock.

1.4 Class

Igneous Rocks

Metamorphic Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Plutonic

Not Applicable

1.6 Other Categories

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Granular

Earthy, Mud-rich, Rough

2.2 Color

Dark Grey to Black

Black, Brown, Colourless, Green, Grey, White

2.3 Maintenance

Less

2.4 Durability

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

Dull

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Decorative Aggregates, Entryways, 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, Paving Stone

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

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

As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Gold and Silver production, Manufacture of Magnesium and Dolomite Refractories

3.2.2 Medical Industry

Not Yet Used

Not Applicable

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

3.4 Other Uses

3.4.1 Commercial Uses

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

Creating Artwork, Gemstone, Jewelry, Metallurgical Flux, Source of Magnesia (MgO)

4 Types

4.1 Types

Not Available

Endoskarns

4.2 Features

Is one of the oldest rock, Smooth to touch

Host Rock for Lead, Zinc and Copper Deposits

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

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.

Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Skarn is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

5.2 Composition

5.2.1 Mineral Content

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

Calcite, Enstatite, Epidote, Garnet, Magnetite, Pyroxene, Titanite

5.2.2 Compound Content

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

Au, CaO, Carbon Dioxide, Cu, Fe, MgO

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering

Not Applicable

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Coastal Erosion, Glacier Erosion, Water Erosion

Not Applicable

6 Properties

6.1 Physical Properties

6.1.1 Hardness

76.5

1 7

6.1.2 Grain Size

Fine Grained

6.1.3 Fracture

Conchoidal

Irregular

6.1.4 Streak

Black

Light to dark brown

6.1.5 Porosity

Highly Porous

Less Porous

6.1.6 Luster

Not Available

Waxy and Dull

6.1.7 Compressive Strength

NANA

0.15 450

7.3.2 Cleavage

Not Available

Slaty

7.3.3 Toughness

1.6

2.4

7.3.4 Specific Gravity

Not Available2.86

0 8.4

7.3.5 Transparency

Opaque

7.3.6 Density

Not Available2.8-2.9 g/cm³

0 1400

7.4 Thermal Properties

7.4.1 Specific Heat Capacity

NA0.92 kJ/Kg K

0.14 3.2

7.4.2 Resistance

Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant

8 Reserves

8.1 Deposits in Eastern Continents

8.1.1 Asia

India, Russia

China, India, Russia, Saudi Arabia, South Korea, Sri Lanka

8.1.2 Africa

South Africa

South Africa, Western Africa

8.1.3 Europe

Germany, Greece, Italy, Scotland, Turkey

United Kingdom

8.1.4 Others

Greenland

Not Yet Found

8.2 Deposits in Western Continents

8.2.1 North America

Canada, USA

Canada

8.2.2 South America

Brazil, Colombia, Venezuela

Brazil, Colombia, Paraguay

8.3 Deposits in Oceania Continent

8.3.1 Australia

New Zealand, Queensland

Central Australia, Western Australia

All about Essexite and Skarn Properties

Know all about Essexite and Skarn properties here. All properties of rocks are important as they define the type of rock and its application. Essexite belongs to Igneous Rocks while Skarn belongs to Metamorphic Rocks.Texture of Essexite is Granular whereas that of Skarn is Earthy, Mud-rich, Rough. Essexite appears Banded and Skarn appears Dull. The luster of Essexite is not available while that of Skarn is waxy and dull. Essexite is available in dark grey to black colors whereas Skarn is available in black, brown, colourless, green, grey, white colors. The commercial uses of Essexite are cemetery markers, commemorative tablets, jewelry, sea defence, tombstones and that of Skarn are creating artwork, gemstone, jewelry, metallurgical flux, source of magnesia (mgo).