Blue Granite

Nephelinite

Blue Granite and Nephelinite

Blue Granite

Nephelinite

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Definition

Blue Granite is an igneous rock and a variety of Larvikite, notable for the presence of thumbnail-sized blue crystals of feldspar

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 the color of rock, Blue

from French néphéline, from Greek nephelē

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Volcanic

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Phaneritic

Aphanitic

Color

Black, Brown, Light to Dark Grey, White

Black, Brown, Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Shiny

Skeletal

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Flooring, Interior Decoration

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

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

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling

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

Types

Granite

Peralkaline Nephelinite

Features

Available in lots of colors, Is one of the oldest rock

Host Rock for Lead

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Blue Granite is an igneous rock which is a variety of Larvikite and is known mainly for the presence of thumbnail-sized crystals of feldspar.

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

Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon

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

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

6-76.5

1 7

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Grain Size

Medium to Fine Coarse Grained

Fine Grained

Fracture

Flat

Streak

White

Porosity

Less Porous

Luster

Subvitreous to Dull

Vitreous to Metallic

Compressive Strength

175.00 N/mm²35.00 N/mm²

0.15 450

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Cleavage

Toughness

2.7

Specific Gravity

2.8-32.4-2.9

0 8.4

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Transparency

Opaque

Density

2.9-2.91 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, Impact Resistant, Pressure Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

Japan

Africa

Rwanda, Tanzania

Europe

Bulgaria, England, Germany, Norway, Romania, Switzerland

Others

Hawaii Islands

Deposits in Western Continents

North America

USA

Canada, USA

South America

Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru

Colombia

Deposits in Oceania Continent

Australia

New South Wales, New Zealand, Queensland, South Australia, Western Australia

All about Blue Granite and Nephelinite Properties

Know all about Blue Granite and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Blue Granite and Nephelinite belong to Igneous Rocks.Texture of Blue Granite is Phaneritic whereas that of Nephelinite is Aphanitic. Blue Granite appears Shiny and Nephelinite appears Skeletal. The luster of Blue Granite is subvitreous to dull while that of Nephelinite is vitreous to metallic. Blue Granite is available in black, brown, light to dark grey, white colors whereas Nephelinite is available in black, brown, green, grey, white colors. The commercial uses of Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).