Definition
Pantellerite is a peralkaline rhyolite. It has a higher iron and lower aluminium composition than comendite
Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix
Origin
Strait of sicily
Egypt
Discoverer
Unknown
Unknown
Etymology
From Pantelleria, a volcanic island in the Strait of Sicily
From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
Texture
Eutaxitic
Porphyritic
Color
Dark Greenish - Grey
Black, Brown, Colourless, Green, Grey, Red, Rust, White
Durability
Durable
Durable
Scratch Resistant
Yes
Yes
Appearance
Layered and Foliated
Dull
Interior Uses
Not Yet Used
Decorative Aggregates, Interior Decoration
Exterior Uses
Not Yet Used
Garden Decoration, Paving Stone
Other Architectural Uses
Not Yet Used
Curbing
Construction Industry
NA
Construction Aggregate
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Artifacts, Sculpture
Artifacts, Monuments, Sculpture
Commercial Uses
Creating Artwork
Creating Artwork, Gemstone, Jewelry
Types
Pantelleritic Ignimbrite
Rhomb Porphyry
Features
High Fe content
Generally rough to touch, Is one of the oldest rock, Surfaces are often shiny
Archaeological Significance
Monuments
Not Yet Used
Used
Famous Monuments
Not Applicable
Data Not Available
Sculpture
Not Yet Used
Used
Famous Sculptures
Not Applicable
Data Not Available
Pictographs
Not Used
Not Used
Petroglyphs
Not Used
Not Used
Figurines
Not Yet Used
Used
Formation
Pantellerite 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.
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.
Mineral Content
Amphibole, Feldspar, Ilmenite
Biotite, Chert, Feldspar, Garnet, Graphite, Quartz, Silica
Compound Content
Al, Fe
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Titanium Dioxide
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Types of Weathering
Biological Weathering, Chemical Weathering
Biological Weathering, Chemical Weathering, Not Registered
Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion
Grain Size
Fine Grained
Fine Grained
Fracture
Sub-conchoidal
Irregular
Porosity
Less Porous
Less Porous
Cleavage
Conchoidal
Imperfect
Specific Gravity
Not Available
2.5-4
Transparency
Translucent to Opaque
Translucent to Opaque
Density
Not Available
2.5-2.52 g/cm3
Resistance
Heat Resistant
Heat Resistant, Impact Resistant
Deposits in Eastern Continents
Asia
China, India
China, Kazakhstan, South Korea, Thailand, Turkey, Vietnam
Africa
Angola, Egypt, Madagascar, Namibia, Nigeria
Egypt, Ethiopia, Ghana, South Africa
Europe
Germany, Iceland, Ireland, Italy, Spain, United Kingdom
Finland, France, Germany, Great Britain, Hungary, Iceland, Ireland, Italy, Netherlands, Norway, Romania, Sweden, Switzerland
Others
Not Yet Found
Greenland
Deposits in Western Continents
North America
Canada, USA
Canada, Cuba, Jamaica, USA
South America
Argentina, Bolivia, Brazil, Colombia, Ecuador
Bolivia, Brazil, Colombia, Ecuador, Paraguay
Deposits in Oceania Continent
Australia
Central Australia, Queensland, Western Australia
New South Wales, New Zealand, Western Australia
Pantellerite vs Porphyry Characteristics
Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Pantellerite vs Porphyry characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Pantellerite and Properties of Porphyry. Learn more about Pantellerite vs Porphyry in the next section. The interior uses of Pantellerite include Not yet used whereas the interior uses of Porphyry include Decorative aggregates and Interior decoration. Due to some exceptional properties of Pantellerite and Porphyry, they have various applications in construction industry. The uses of Pantellerite in construction industry include Na and that of Porphyry include Construction aggregate.
More about Pantellerite and Porphyry
Here you can know more about Pantellerite and Porphyry. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Pantellerite and Porphyry consists of mineral content and compound content. The mineral content of Pantellerite includes Amphibole, Feldspar, Ilmenite and mineral content of Porphyry includes Biotite, Chert, Feldspar, Garnet, Graphite, Quartz, Silica. You can also check out the list of all Igneous Rocks. When we have to compare Pantellerite vs Porphyry, the texture, color and appearance plays an important role in determining the type of rock. Pantellerite is available in dark greenish - grey colors whereas, Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors. Appearance of Pantellerite is Layered and Foliated and that of Porphyry is Dull. Properties of rock is another aspect for Pantellerite vs Porphyry. Hardness of Pantellerite and Porphyry is 6-7. The types of Pantellerite are Pantelleritic Ignimbrite whereas types of Porphyry are Rhomb Porphyry. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Pantellerite is unknown while that of Porphyry is white. The specific heat capacity of Pantellerite is Not Available and that of Porphyry is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Pantellerite is heat resistant whereas Porphyry is heat resistant, impact resistant.