Essexite

Basalt

Essexite and Basalt

Essexite

Basalt

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Definition

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

Basalt is a common extrusive igneous rock formed by the rapid cooling of basaltic lava exposed at or very near the surface of Earth

History

Origin

USA

Egypt

Discoverer

Unknown

Georgius Agricola

Etymology

From the locality in Essex County, Massachusetts,US

From Late Latin Basaltes (variant of basanites ), very hard stone, which was imported from Ancient Greek Basanites

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Granular

Glassy, Massive, Porphyritic, Scoriaceous, Vesicular

Color

Dark Grey to Black

Black, Brown, Light to Dark Grey

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Banded

Dull and Soft

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Floor Tiles, Homes, Hotels, Kitchens

Exterior Uses

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

As Building Stone, Paving Stone, Garden Decoration, Office Buildings

Other Architectural Uses

Curbing

Curbing, Whetstones

Industry

Construction Industry

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

Arrowheads, As Dimension Stone, Cobblestones, Cutting Tool, Rail Track Ballast, Roadstone

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Monuments

Other Uses

Commercial Uses

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

An Oil and Gas Reservoir, Commemorative Tablets, Creating Artwork, Used in aquariums

Types

Intermediate volcanic rock

Alkaline Basalt, Boninite, High Alumina Basalt, Mid Ocean Ridge Basalt (MORB), Tholeiitic Basalt, Basaltic trachyandesite, Mugearite and Shoshonite

Features

Is one of the oldest rock, Smooth to touch

Has High structural resistance against erosion and climate, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Easter Island in the Polynesian Triangle, Pacific Ocean, Gateway of India in Mumbai, India, Gol Gumbaz in Karnataka, India

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

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.

Basalt forms when lava reaches the Earth's surface near an active volcano. The temperature of lava is between 1100 to 1250° C when it gets to the surface.

Composition

Mineral Content

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

Olivine, Plagioclase, Pyroxene

Compound Content

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

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

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

Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering

Biological Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion, Glacier Erosion, Water Erosion

Properties

Physical Properties

Hardness

1 7

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Grain Size

Fine Grained

Fracture

Conchoidal

Streak

Black

White to Grey

Porosity

Highly Porous

Less Porous

Luster

Compressive Strength

120.00 N/mm²37.40 N/mm²

0.15 450

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Cleavage

Toughness

1.6

2.3

Specific Gravity

-99992.8-3

0 8.4

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Transparency

Opaque

Density

-9999 g/cm³2.9-3.1 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

Africa

South Africa

Europe

Germany, Greece, Italy, Scotland, Turkey

Iceland

Others

Greenland

Deposits in Western Continents

North America

Canada, USA

South America

Brazil, Colombia, Venezuela

Brazil

Deposits in Oceania Continent

Australia

New Zealand, Queensland

All about Essexite and Basalt Properties

Know all about Essexite and Basalt properties here. All properties of rocks are important as they define the type of rock and its application. Essexite and Basalt belong to Igneous Rocks.Texture of Essexite is Granular whereas that of Basalt is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Essexite appears Banded and Basalt appears Dull and Soft. The luster of Essexite and Basalt is . Essexite is available in dark grey to black colors whereas Basalt is available in black, brown, light to dark grey colors. The commercial uses of Essexite are cemetery markers, commemorative tablets, jewelry, sea defence, tombstones and that of Basalt are an oil and gas reservoir, commemorative tablets, creating artwork, used in aquariums.