Jadeitite

Nephelinite

Jadeitite and Nephelinite

Jadeitite

Nephelinite

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Definition

Jadeitite is a metamorphic rock usually found in blueschist grade metamorphic terrains

Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).

History

Origin

Brazil

Discoverer

Unknown

Etymology

From pyroxene mineral jadeite

from French néphéline, from Greek nephelē

Class

Metamorphic Rocks

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Earthy

Aphanitic

Color

Black, Brown, Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Rough and Dull

Skeletal

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

Garden Decoration, Office Buildings, Paving Stone

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cutting Tool, Knives

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Jewellery, Monuments, Sculpture

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Commemorative Tablets, Creating Artwork, Jewelry

Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)

Types

Metamorphic rock

Peralkaline Nephelinite

Features

Host Rock for Lead

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

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

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.

Composition

Mineral Content

Carbonate, Magnetite, Pyrrhotite, Serpentine, Sulfides

Clinopyroxene, Nepheline, Plagioclase

Compound Content

Ca, CaO, Carbon Dioxide, KCl, MgO, Sulfur Dioxide, Sulphur

Ca, CaO, Carbon, Cl, MgO

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion, Water Erosion, Wind Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3-56.5

1 7

👆🏻

Grain Size

Very fine-grained

Fine Grained

Fracture

Uneven

Flat

Streak

White, Greenish White or Grey

White

Porosity

Less Porous

Luster

Waxy and Dull

Vitreous to Metallic

Compressive Strength

310.00 N/mm²35.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

2.7

Specific Gravity

2.79-32.4-2.9

0 8.4

👆🏻

Transparency

Opaque

Density

2.5-3 g/cm³2.5-3 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.95 kJ/Kg K0.88 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Water Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Saudi Arabia, Singapore, South Korea

Japan

Africa

Ethiopia, Western Africa

Rwanda, Tanzania

Europe

England, Georgia, Switzerland, United Kingdom

Others

Hawaii Islands

Deposits in Western Continents

North America

Canada

Canada, USA

South America

Colombia

Deposits in Oceania Continent

Australia

Central Australia, New South Wales, New Zealand, Western Australia

All about Jadeitite and Nephelinite Properties

Know all about Jadeitite and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Jadeitite belongs to Metamorphic Rocks while Nephelinite belongs to Igneous Rocks.Texture of Jadeitite is Earthy whereas that of Nephelinite is Aphanitic. Jadeitite appears Rough and Dull and Nephelinite appears Skeletal. The luster of Jadeitite is waxy and dull while that of Nephelinite is vitreous to metallic. Jadeitite and Nephelinite are available in black, brown, green, grey, white colors. The commercial uses of Jadeitite are commemorative tablets, creating artwork, jewelry and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).