Granite

Porphyry

Granite and Porphyry

Granite

Porphyry

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1 Definition

1.1 Definition

Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone

Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix

1.2 History

1.2.1 Origin

Unknown

Egypt

1.2.2 Discoverer

Unknown

1.3 Etymology

From Italian granito, which means grained rock, from grano grain, and from Latin granum

From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites

1.4 Class

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Plutonic

1.6 Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Granular, Phaneritic

Porphyritic

2.2 Color

Black, Grey, Orange, Pink, White

Black, Brown, Colourless, Green, Grey, Red, Rust, White

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

81% Igneous Rocks Rocks have it !

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81% Igneous Rocks Rocks have it !

2.4.2 Scratch Resistant

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86% Igneous Rocks Rocks have it !

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86% Igneous Rocks Rocks have it !

2.4.3 Stain Resistant

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66% Igneous Rocks Rocks have it !

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66% Igneous Rocks Rocks have it !

2.4.4 Wind Resistant

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49% Igneous Rocks Rocks have it !

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49% Igneous Rocks Rocks have it !

2.4.5 Acid Resistant

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48% Igneous Rocks Rocks have it !

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48% Igneous Rocks Rocks have it !

2.5 Appearance

Veined or Pebbled

Dull

3 Uses

3.1 Architecture

3.1.1 Interior Uses

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

Decorative Aggregates, Interior Decoration

3.1.2 Exterior Uses

As Building Stone, As Facing Stone, Bridges, Paving Stone, Garden Decoration, Near Swimming Pools, Office Buildings, Resorts

Garden Decoration, Paving Stone

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

As Dimension Stone

Construction Aggregate

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

3.4 Other Uses

3.4.1 Commercial Uses

Curling, Gemstone, Laboratory bench tops, Tombstones, Used in aquariums

Creating Artwork, Gemstone, Jewelry

4 Types

4.1 Types

Igneous Protolith Granite, Sedimentary Protolith Granite, Mantle Granite, Anorogenic Granite, Hybrid Granite, Granodiorite and Alkali Feldspar Granite

Rhomb Porphyry

4.2 Features

Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock

Generally rough to touch, Is one of the oldest rock, Surfaces are often shiny

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Agia Sophia in Istanbul, Turkey, Blue Domed Church in Santorini, Greece, Blue Mosque in Istanbul, Charminar in Hyderabad, India, Diana, Princess of Wales Memorial Fountain in London, UK, Ephesus in Turkey, Georgia Guidestones in Georgia, US, Hermitage in Saint Petersburg, Khajuraho Temples, India, Mahabalipuram in Tamil Nadu, India, Mysore Palace in Karnataka, India, Signers Monument in Augusta, Georgia, Statue of Liberty in New York, USA, Taj Mahal in Agra, India, Tower Bridge in London, Vietnam Veterans Memorial in Washington, US, Washington Monument, US

Data Not Available

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Avukana Buddha Statue in Sri Lanka, Lincoln Memorial in America, Mount Rushmore National Memorial in South Dakota, US, The Colossal Red Granite Statue of Amenhotep III in Karnak, Egypt

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

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

Porphyry is formed in two stages: the magma cools slowly deep within the crust or the magma is cools rapidly as it erupts from a volcano, creating small grains that are usually invisible to naked eye.

5.2 Composition

5.2.1 Mineral Content

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

Biotite, Chert, Feldspar, Garnet, Graphite, Quartz, Silica

5.2.2 Compound Content

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

Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Titanium Dioxide

5.3 Transformation

5.3.1 Metamorphism

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97% Igneous Rocks Rocks have it !

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97% Igneous Rocks Rocks have it !

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism

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

5.3.3 Weathering

✔ ✘

99% Igneous Rocks Rocks have it !

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99% Igneous Rocks Rocks have it !

5.3.4 Types of Weathering

Biological Weathering

Biological Weathering, Chemical Weathering, Not Registered

5.3.5 Erosion

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92% Igneous Rocks Rocks have it !

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92% Igneous Rocks Rocks have it !

5.3.6 Types of Erosion

Chemical Erosion, Sea Erosion, Water Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6-7

6.1.2 Grain Size

Large and Coarse Grained

Fine Grained

6.1.3 Fracture

Not Available

Irregular

6.1.4 Streak

White

6.1.5 Porosity

Less Porous

6.1.6 Luster

Dull to Grainy with Sporadic parts Pearly and Vitreous

Dull

6.1.7 Compressive Strength

What Is Flint

⊕

▶

▼

175.00 N/mm²

Rank: 13 (Overall)▶

Not Available

Rank: N/A (Overall)▶

▲

What Is Obsidian

⊕

▶

175 (What Is Grani..)

◀ ▶ ADD ⊕

6.1.8 Cleavage

Not Available

Imperfect

6.1.9 Toughness

Not Available

1.7

6.1.10 Specific Gravity

2.6-2.7

2.5-4

6.1.11 Transparency

Opaque

Translucent to Opaque

6.1.12 Density

2.65-2.75 g/cm³

2.5-2.52 g/cm³

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

What Is Banded ..

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▶

▼

0.79 kJ/Kg K

Rank: 16 (Overall)▶

Not Available

Rank: N/A (Overall)▶

▲

What Is Granulite

⊕

▶

1.09 (What Is Trave..)

◀ ▶ ADD ⊕

6.2.2 Resistance

Heat Resistant, Wear Resistant

Heat Resistant, Impact Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

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

China, Kazakhstan, South Korea, Thailand, Turkey, Vietnam

7.1.2 Africa

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

Egypt, Ethiopia, Ghana, South Africa

7.1.3 Europe

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

Finland, France, Germany, Great Britain, Hungary, Iceland, Ireland, Italy, Netherlands, Norway, Romania, Sweden, Switzerland

7.1.4 Others

Not Yet Found

Greenland

7.2 Deposits in Western Continents

7.2.1 North America

Canada, USA

Canada, Cuba, Jamaica, USA

7.2.2 South America

Not Yet Found

Bolivia, Brazil, Colombia, Ecuador, Paraguay

7.3 Deposits in Oceania Continent

7.3.1 Australia

Not Yet Found

New South Wales, New Zealand, Western Australia

All about Granite and Porphyry Properties

Know all about Granite and Porphyry properties here. All properties of rocks are important as they define the type of rock and its application. Granite and Porphyry belong to Igneous Rocks.Texture of Granite is Granular, Phaneritic whereas that of Porphyry is Porphyritic. Granite appears Veined or Pebbled and Porphyry appears Dull. The luster of Granite is dull to grainy with sporadic parts pearly and vitreous while that of Porphyry is dull. Granite is available in black, grey, orange, pink, white colors whereas Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors. The commercial uses of Granite are curling, gemstone, laboratory bench tops, tombstones, used in aquariums and that of Porphyry are creating artwork, gemstone, jewelry.