Porphyry

Granulite

Porphyry and Granulite

Porphyry

Granulite

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1 Definition

1.1 Definition

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

Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.

1.2 History

1.2.1 Origin

Egypt

Central Europe

1.2.2 Discoverer

Unknown

1.3 Etymology

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

From Latin granulum, a little grain or fine grained

1.4 Class

Igneous Rocks

Metamorphic Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Plutonic

Not Applicable

1.6 Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Porphyritic

Granoblastic

2.2 Color

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

Black, Brown

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Dull

Veined or Pebbled

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Interior Decoration

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

3.1.2 Exterior Uses

Garden Decoration, Paving Stone

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

Construction Aggregate

As Dimension Stone, Building houses or walls

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork, Gemstone, Jewelry

Curling, Gemstone, Laboratory bench tops, Soil Conditioner, Tombstones

4 Types

4.1 Types

Rhomb Porphyry

Not Available

4.2 Features

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

Clasts are smooth to touch

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Data Not Available

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

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

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.

Granulite is a fine-grained granular metamorphic rock in which the main component minerals are feldspars and quartz and forms at high temperature and pressure conditions.

5.2 Composition

5.2.1 Mineral Content

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

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

5.2.2 Compound Content

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

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

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

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

Not Applicable

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Not Registered

Biological Weathering, Chemical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Water Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6-76-7

1 7

1.1.1 Grain Size

Fine Grained

Medium to Coarse Grained

1.2.2 Fracture

Irregular

Not Available

1.2.4 Streak

White

1.3.2 Porosity

Less Porous

Very Less Porous

1.3.4 Luster

Dull

Vitreous

1.3.6 Compressive Strength

NA175.00 N/mm²

0.15 450

1.3.10 Cleavage

Imperfect

1.3.11 Toughness

1.7

Not Available

1.3.12 Specific Gravity

2.5-42.8-3.0

0 8.4

1.3.13 Transparency

Translucent to Opaque

Opaque

1.3.14 Density

2.5-2.52 g/cm³3.06-3.33 g/cm³

0 1400

1.4 Thermal Properties

1.4.1 Specific Heat Capacity

NA0.14 kJ/Kg K

0.14 3.2

1.4.2 Resistance

Heat Resistant, Impact Resistant

Heat Resistant, Wear Resistant

2 Reserves

2.1 Deposits in Eastern Continents

2.1.1 Asia

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

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

2.1.2 Africa

Egypt, Ethiopia, Ghana, South Africa

Angola, Egypt, Madagascar, Nigeria, South Africa

2.1.3 Europe

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

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

2.1.4 Others

Greenland

Not Yet Found

2.2 Deposits in Western Continents

2.2.1 North America

Canada, Cuba, Jamaica, USA

Canada, USA

2.2.2 South America

Bolivia, Brazil, Colombia, Ecuador, Paraguay

Not Yet Found

2.3 Deposits in Oceania Continent

2.3.1 Australia

New South Wales, New Zealand, Western Australia

Not Yet Found

All about Porphyry and Granulite Properties

Know all about Porphyry and Granulite properties here. All properties of rocks are important as they define the type of rock and its application. Porphyry belongs to Igneous Rocks while Granulite belongs to Metamorphic Rocks.Texture of Porphyry is Porphyritic whereas that of Granulite is Granoblastic. Porphyry appears Dull and Granulite appears Veined or Pebbled. The luster of Porphyry is dull while that of Granulite is vitreous. Porphyry and Granulite are available in black, brown, colourless, green, grey, red, rust, white colors. The commercial uses of Porphyry are creating artwork, gemstone, jewelry and that of Granulite are curling, gemstone, laboratory bench tops, soil conditioner, tombstones.