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Andesite
Andesite

Pegmatite
Pegmatite



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Andesite
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Pegmatite

Andesite vs Pegmatite

Definition

Definition

Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava
Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals

History

Origin

North America
Unknown

Discoverer

Unknown
R. J. Hauy

Etymology

From Andes mountains, where it is found in abundance
From Greek pegma, pegmat which means- thing joined together + -ite

Class

Igneous Rocks
Igneous Rocks

Sub-Class

Durable Rock, Hard Rock
Durable Rock, Hard Rock

Family

Group

Volcanic
Plutonic

Other Categories

Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock

Texture

Texture

Aphanitic to Porphyritic
Pegmatitic

Color

Bluish - Grey, Grey, Pink, Yellow
Black, Brown, Cream, Green, Grey, Pink, Red, Rust, Silver, White, Yellow

Maintenance

More
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Dull and Soft
Layered, Banded, Veined and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens
Decorative Aggregates, Flooring, Interior Decoration

Exterior Uses

Office Buildings, Roof Tiles
As Building Stone, As Facing Stone, Paving Stone

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

Cobblestones, Construction Aggregate, for Road Aggregate
As Dimension Stone, Building houses or walls, Construction Aggregate, for Road Aggregate, Landscaping

Medical Industry

Not Available
Not Available

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines
Artifacts, Sculpture, Small Figurines

Other Uses

Commercial Uses

Commemorative Tablets, Creating Artwork
Creating Artwork, Jewelry, Source of corundum, tourmalines, beryls and topaz

Types

Types

Icelandite
Granite Pegmatite, Gabbro Pegmatite and Diorite Pegmatite

Features

Generally rough to touch, High silica content, Is one of the oldest rock
Generally rough to touch, Is one of the oldest rock, Source of corundum, tourmalines, beryls and topaz

Archaeological Significance

Monuments

Used
Not Yet Used

Famous Monuments

Middle of the Earth in Ecuador
Not Applicable

Sculpture

Used
Used

Famous Sculptures

Not Available
Not Available

Pictographs

Not Used
Not Used

Petroglyphs

Not Used
Not Used

Figurines

Used
Used

Fossils

Absent
Absent

Formation

Formation

Andesite is a fine-grained igneous rock that forms when the magma is erupted onto the surface and is crystallized quickly.
Pegmatite rock is holocrystalline, intrusive igneous rock which is formed by partial melting and dewatering during the process of metamorphism.

Composition

Mineral Content

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon
Apatite, Beryl, Feldspar, Fluorite, Garnet, Lepidolite, Quartz, Silica, Spodumene, Topaz

Compound Content

Silicon Dioxide
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, Phosphorus Pentoxide

Transformation

Metamorphism

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

Weathering

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

77
1 7
👆🏻

Grain Size

Very fine-grained
Medium to Coarse Grained

Fracture

Uneven
Conchoidal

Streak

White
White

Porosity

Less Porous
Less Porous

Luster

Vitreous
Grainy, Pearly and Vitreous

Compressive Strength

225.00 N/mm2178.54 N/mm2
0.15 450
👆🏻

Cleavage

Not Available
Perfect

Toughness

1.1
2.1

Specific Gravity

2.5-2.82.6-2.63
0 8.4
👆🏻

Transparency

Opaque
Translucent to Opaque

Density

2.11-2.36 g/cm32.6-2.65 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

2.39 kJ/Kg KNA
0.14 3.2
👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Indonesia, Japan, Nepal, South Korea
China, India, Iran, Japan, Nepal, North Korea, Russia, Saudi Arabia, South Korea

Africa

Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania
South Africa

Europe

Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom
Austria, France, Greece, Ireland, Italy, Netherlands, Slovakia, Spain, Turkey, Ukraine

Others

Not Available
Not Available

Deposits in Western Continents

North America

Mexico, USA
Canada

South America

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

Deposits in Oceania Continent

Australia

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

Andesite vs Pegmatite Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Andesite and Pegmatite Reserves. Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava. Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Andesite vs Pegmatite information and Andesite vs Pegmatite characteristics in the upcoming sections.

Andesite vs Pegmatite 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. Andesite vs Pegmatite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Andesite and Properties of Pegmatite. Learn more about Andesite vs Pegmatite in the next section. The interior uses of Andesite include Decorative aggregates, Floor tiles, Homes, Interior decoration and Kitchens whereas the interior uses of Pegmatite include Decorative aggregates, Flooring and Interior decoration. Due to some exceptional properties of Andesite and Pegmatite, they have various applications in construction industry. The uses of Andesite in construction industry include Cobblestones, Construction aggregate, For road aggregate and that of Pegmatite include As dimension stone, Building houses or walls, Construction aggregate, For road aggregate, Landscaping.

More about Andesite and Pegmatite

Here you can know more about Andesite and Pegmatite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Andesite and Pegmatite consists of mineral content and compound content. The mineral content of Andesite includes Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon and mineral content of Pegmatite includes Apatite, Beryl, Feldspar, Fluorite, Garnet, Lepidolite, Quartz, Silica, Spodumene, Topaz. You can also check out the list of all Igneous Rocks. When we have to compare Andesite vs Pegmatite, the texture, color and appearance plays an important role in determining the type of rock. Andesite is available in bluish - grey, grey, pink, yellow colors whereas, Pegmatite is available in black, brown, cream, green, grey, pink, red, rust, silver, white, yellow colors. Appearance of Andesite is Dull and Soft and that of Pegmatite is Layered, Banded, Veined and Shiny. Properties of rock is another aspect for Andesite vs Pegmatite. Hardness of Andesite and Pegmatite is 7. The types of Andesite are Icelandite whereas types of Pegmatite are Granite Pegmatite, Gabbro Pegmatite and Diorite Pegmatite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Andesite and Pegmatite is white. The specific heat capacity of Andesite is 2.39 kJ/Kg K and that of Pegmatite is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Andesite is heat resistant, pressure resistant, wear resistant whereas Pegmatite is heat resistant, impact resistant, pressure resistant.