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Porphyry
Porphyry

Icelandite
Icelandite



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Porphyry
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Icelandite

Porphyry and Icelandite

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
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
1.2 History
1.2.1 Origin
Egypt
Iceland
1.2.2 Discoverer
Unknown
Ian S. E. Carmichael
1.3 Etymology
From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Plutonic
Volcanic
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Porphyritic
Aphanitic to Porphyritic
2.2 Color
Black, Brown, Colourless, Green, Grey, Red, Rust, White
Bluish - Grey, Grey, Pink, Yellow
2.3 Maintenance
Less
More
2.4 Durability
Durable
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
Dull and Soft
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Interior Decoration
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens
3.1.2 Exterior Uses
Garden Decoration, Paving Stone
Office Buildings, Roof Tiles
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
Construction Aggregate
Cobblestones, Construction Aggregate, for Road Aggregate
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts, Monuments, Sculpture
Artifacts, Jewellery, Sculpture, Small Figurines
3.4 Other Uses
3.4.1 Commercial Uses
Creating Artwork, Gemstone, Jewelry
Cemetery Markers, Creating Artwork
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
Generally rough to touch, High silica content, Is one of the oldest rock
4.3 Archaeological Significance
4.3.1 Monuments
Used
Not Yet Used
4.3.2 Famous Monuments
Data Not Available
Not Applicable
4.3.3 Sculpture
Used
Used
4.3.4 Famous Sculptures
Data Not Available
Data Not Available
4.3.5 Pictographs
Not Used
Not Used
4.3.6 Petroglyphs
Not Used
Not Used
4.3.7 Figurines
Used
Used
4.4 Fossils
Absent
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.
Icelandite 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.
5.2 Composition
5.2.1 Mineral Content
Biotite, Chert, Feldspar, Garnet, Graphite, Quartz, Silica
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon
5.2.2 Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Titanium Dioxide
Silicon 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
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
5.3.3 Weathering
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering, Not Registered
Biological Weathering
5.3.5 Erosion
5.3.6 Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion
Chemical Erosion, Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
6-77
Coal
1 7
6.1.2 Grain Size
Fine Grained
Very fine-grained
6.1.3 Fracture
Irregular
Uneven
6.1.4 Streak
White
White
6.1.5 Porosity
Less Porous
Less Porous
6.1.6 Luster
Dull
Vitreous
6.1.7 Compressive Strength
NANA
What Is Obsidian
0.15 450
6.1.8 Cleavage
Imperfect
Not Available
6.1.9 Toughness
1.7
1.1
6.1.10 Specific Gravity
2.5-42.5-2.8
Granite
0 8.4
6.1.11 Transparency
Translucent to Opaque
Opaque
6.1.12 Density
2.5-2.52 g/cm32.11-2.36 g/cm3
Granite
0 1400
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
NA2.39 kJ/Kg K
What Is Granulite
0.14 3.2
6.2.2 Resistance
Heat Resistant, Impact Resistant
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
China, Kazakhstan, South Korea, Thailand, Turkey, Vietnam
India, Indonesia, Japan, Nepal, South Korea
7.1.2 Africa
Egypt, Ethiopia, Ghana, South Africa
Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania
7.1.3 Europe
Finland, France, Germany, Great Britain, Hungary, Iceland, Ireland, Italy, Netherlands, Norway, Romania, Sweden, Switzerland
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom
7.1.4 Others
Greenland
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Canada, Cuba, Jamaica, USA
Mexico, USA
7.2.2 South America
Bolivia, Brazil, Colombia, Ecuador, Paraguay
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
7.3 Deposits in Oceania Continent
7.3.1 Australia
New South Wales, New Zealand, Western Australia
New South Wales, New Zealand, Western Australia

All about Porphyry and Icelandite Properties

Know all about Porphyry and Icelandite properties here. All properties of rocks are important as they define the type of rock and its application. Porphyry and Icelandite belong to Igneous Rocks.Texture of Porphyry is Porphyritic whereas that of Icelandite is Aphanitic to Porphyritic. Porphyry appears Dull and Icelandite appears Dull and Soft. The luster of Porphyry is dull while that of Icelandite is vitreous. Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors whereas Icelandite is available in bluish - grey, grey, pink, yellow colors. The commercial uses of Porphyry are creating artwork, gemstone, jewelry and that of Icelandite are cemetery markers, creating artwork.