Granodiorite

Nephelinite

Granodiorite and Nephelinite

Granodiorite

Nephelinite

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Definition

Granodiorite is a coarse-grained intrusive igneous rock containing quartz and plagioclase, and which has composition in between granite and diorite

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 granite + diorite

from French néphéline, from Greek nephelē

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Plutonic

Other Categories

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Granular, Phaneritic

Aphanitic

Color

Black, Grey, Orange, Pink, White

Black, Brown, Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Veined or Pebbled

Skeletal

Uses

Architecture

Interior Uses

Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Homes, Hotels, Interior Decoration, Stair Treads

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone

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

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Curling, Gemstone, Laboratory bench tops, Tombstones

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

Types

Granodiorite

Peralkaline Nephelinite

Features

Available in Lots of Colors and Patterns

Host Rock for Lead

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Granodiorite is an intrusive igneous rock which is very hard, crystalline and is visibly homogeneous in texture and forms by melting of continental rocks.

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

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz

Clinopyroxene, Nepheline, Plagioclase

Compound Content

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

Ca, CaO, Carbon, Cl, MgO

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

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

Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Chemical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Glacier Erosion, Wind Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

66.5

1 7

👆🏻

Grain Size

Medium to Coarse Grained

Fine Grained

Fracture

Flat

Streak

White

Porosity

Less Porous

Luster

Grainy, Pearly and Vitreous

Vitreous to Metallic

Compressive Strength

175.00 N/mm²35.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

2.7

Specific Gravity

2.6-2.72.4-2.9

0 8.4

👆🏻

Transparency

Opaque

Density

2.6-2.8 g/cm³2.5-3 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.88 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Wear Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam

Japan

Africa

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

Rwanda, Tanzania

Europe

Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic

Others

Hawaii Islands

Deposits in Western Continents

North America

Canada, USA

South America

Colombia

Deposits in Oceania Continent

Australia

All about Granodiorite and Nephelinite Properties

Know all about Granodiorite and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Granodiorite and Nephelinite belong to Igneous Rocks.Texture of Granodiorite is Granular, Phaneritic whereas that of Nephelinite is Aphanitic. Granodiorite appears Veined or Pebbled and Nephelinite appears Skeletal. The luster of Granodiorite is grainy, pearly and vitreous while that of Nephelinite is vitreous to metallic. Granodiorite is available in black, grey, orange, pink, white colors whereas Nephelinite is available in black, brown, green, grey, white colors. The commercial uses of Granodiorite are curling, gemstone, laboratory bench tops, tombstones and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).