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Picrite
Picrite

Andesite
Andesite



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Picrite
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Andesite

Picrite vs Andesite

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Definition

Definition

Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava

History

Origin

Hawaii Islands
North America

Discoverer

Unknown
Theodor von Gümbel

Etymology

From Greek pikros bitter + -ite, 19th century
From Andes mountains, where it is found in abundance

Class

Igneous Rocks
Igneous Rocks

Sub-Class

Durable Rock, Hard Rock
Durable Rock, Hard Rock

Family

Group

Volcanic
Volcanic

Other Categories

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

Texture

Texture

Earthy, Rough
Aphanitic to Porphyritic

Color

Black, Brown, Green, Grey, Pink, White, Yellow
Bluish - Grey, Grey, Pink, Yellow

Maintenance

Less
More

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Rough and Shiny
Dull and Soft

Uses

Architecture

Interior Uses

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

Exterior Uses

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

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

As a Sintering Agent in Steel Industry to process Iron Ore, Cement Manufacture, for Road Aggregate, Manufacture of Magnesium and Dolomite Refractories, Roadstone, Used for flooring, stair treads, borders and window sills.
Cobblestones, Construction Aggregate, for Road Aggregate

Medical Industry

-
-

Antiquity Uses

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

Other Uses

Commercial Uses

As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)
Commemorative Tablets, Creating Artwork

Types

Types

Oceanite
Icelandite

Features

Host Rock for Lead
Generally rough to touch, High silica content, Is one of the oldest rock

Archaeological Significance

Monuments

-
-

Famous Monuments

-
Middle of the Earth in Ecuador

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Picrite 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.
Andesite is a fine-grained igneous rock that forms when the magma is erupted onto the surface and is crystallized quickly.

Composition

Mineral Content

Biotite, Olivine, Plagioclase, Pyrrhotite
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon

Compound Content

Al, CaO, Carbon Dioxide, Mg, MgO
Silicon Dioxide

Transformation

Metamorphism

Types of Metamorphism

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

Weathering

Types of Weathering

Biological Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

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

Properties

Physical Properties

Hardness

6.87
1 7
👆🏻

Grain Size

Fine Grained
Very fine-grained

Fracture

Uneven
Uneven

Streak

White, Greenish White or Grey
White

Porosity

Less Porous
Less Porous

Luster

Subvitreous to Dull
Vitreous

Compressive Strength

189.00 N/mm2225.00 N/mm2
0.15 450
👆🏻

Cleavage

-
-

Toughness

2.1
1.1

Specific Gravity

2.75-2.922.5-2.8
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

1.5-2.5 g/cm32.11-2.36 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.88 kJ/Kg K2.39 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant
Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia
India, Indonesia, Japan, Nepal, South Korea

Africa

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

Europe

Iceland
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom

Others

-
-

Deposits in Western Continents

North America

Canada, USA
Mexico, USA

South America

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

Deposits in Oceania Continent

Australia

-
New South Wales, New Zealand, Western Australia

Picrite vs Andesite 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 Picrite and Andesite Reserves. Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava. 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 Picrite vs Andesite information and Picrite vs Andesite characteristics in the upcoming sections.

Picrite vs Andesite 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. Picrite vs Andesite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Picrite and Properties of Andesite. Learn more about Picrite vs Andesite in the next section. The interior uses of Picrite include Countertops, Decorative aggregates, Homes and Interior decoration whereas the interior uses of Andesite include Decorative aggregates, Floor tiles, Homes, Interior decoration and Kitchens. Due to some exceptional properties of Picrite and Andesite, they have various applications in construction industry. The uses of Picrite in construction industry include As a sintering agent in steel industry to process iron ore, Cement manufacture, For road aggregate, Manufacture of magnesium and dolomite refractories, Roadstone, Used for flooring, stair treads, borders and window sills. and that of Andesite include Cobblestones, Construction aggregate, For road aggregate.

More about Picrite and Andesite

Here you can know more about Picrite and Andesite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Picrite and Andesite consists of mineral content and compound content. The mineral content of Picrite includes Biotite, Olivine, Plagioclase, Pyrrhotite and mineral content of Andesite includes Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon. You can also check out the list of all Igneous Rocks. When we have to compare Picrite vs Andesite, the texture, color and appearance plays an important role in determining the type of rock. Picrite is available in black, brown, green, grey, pink, white, yellow colors whereas, Andesite is available in bluish - grey, grey, pink, yellow colors. Appearance of Picrite is Rough and Shiny and that of Andesite is Dull and Soft. Properties of rock is another aspect for Picrite vs Andesite. The hardness of Picrite is 6.8 and that of Andesite is 7. The types of Picrite are Oceanite whereas types of Andesite are Icelandite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Picrite and Andesite is white, greenish white or grey. The specific heat capacity of Picrite is 0.88 kJ/Kg K and that of Andesite is 2.39 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Picrite is heat resistant whereas Andesite is heat resistant, pressure resistant, wear resistant.