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Rapakivi Granite
Rapakivi Granite

Arkose
Arkose



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Rapakivi Granite
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Arkose

Rapakivi Granite vs Arkose

Definition

Definition

Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar

History

Origin

Finland, Europe
France

Discoverer

Jakob Sederholm
Alexandre Brongniart

Etymology

From Finnish Rapakivi which stands for crumbly rock
From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones

Class

Igneous Rocks
Sedimentary Rocks

Sub-Class

Durable Rock, Hard Rock
Durable Rock, Hard Rock

Family

Group

Plutonic
-

Other Categories

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

Texture

Texture

Granular, Phaneritic
Clastic

Color

Black, Grey, Orange, Pink, White
Reddish Brown

Maintenance

More
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Veined or Pebbled
Rough and Dull

Uses

Architecture

Interior Uses

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

Exterior Uses

As Building Stone, As Facing Stone, Office Buildings, Paving Stone, Resorts
Paving Stone, Office Buildings

Other Architectural Uses

-
Whetstones

Industry

Construction Industry

As Dimension Stone
Cement Manufacture, Construction Aggregate, for Road Aggregate, Production of Glass and Ceramics, Raw material for the manufacture of mortar

Medical Industry

-
-

Antiquity Uses

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

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Laboratory bench tops, Tombstones
In aquifers, Soil Conditioner, Source of Magnesia (MgO), Tombstones

Types

Types

Igneous Protolith Granite, Sedimentary Protolith Granite, Mantle Granite, Anorogenic Granite and Hybrid Granite
Arkose

Features

Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock
Available in Lots of Colors and Patterns, Generally rough to touch, Is one of the oldest rock

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Present

Formation

Formation

Granite is an igneous rock which is very hard, crystalline and is visibly homogeneous in texture and forms by melting of continental rocks
Arkose rock forms from the weathering of feldspar-rich igneous or metamorphic rock, most commonly granitic rocks, which are primarily composed of quartz and feldspar.

Composition

Mineral Content

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz
Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz

Compound Content

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

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact 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, Water Erosion, Wind Erosion
Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

6-76-7
1 7
👆🏻

Grain Size

Large and Coarse Grained
Coarse Grained

Fracture

-
Conchoidal

Streak

White
White

Porosity

Less Porous
Highly Porous

Luster

Dull to Grainy with Sporadic parts Pearly and Vitreous
Dull

Compressive Strength

175.00 N/mm280.00 N/mm2
0.15 450
👆🏻

Cleavage

-
-

Toughness

-
-

Specific Gravity

2.6-2.70
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

2.6-2.8 g/cm3-9999 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.78 kJ/Kg K
0.14 3.2
👆🏻

Resistance

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

Reserves

Deposits in Eastern Continents

Asia

China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan

Africa

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
Namibia, Nigeria, South Africa

Europe

Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom

Others

-
Greenland

Deposits in Western Continents

North America

Canada, USA
Canada, USA

South America

-
Brazil

Deposits in Oceania Continent

Australia

-
New South Wales, New Zealand

Rapakivi Granite vs Arkose 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 Rapakivi Granite and Arkose Reserves. Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase. Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar. 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 Rapakivi Granite vs Arkose information and Rapakivi Granite vs Arkose characteristics in the upcoming sections.

Rapakivi Granite vs Arkose 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. Rapakivi Granite vs Arkose characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Rapakivi Granite and Properties of Arkose. Learn more about Rapakivi Granite vs Arkose in the next section. The interior uses of Rapakivi Granite include Bathrooms, Countertops, Decorative aggregates, Entryways, Floor tiles, Flooring, Homes, Hotels, Interior decoration, Kitchens and Stair treads whereas the interior uses of Arkose include Decorative aggregates, Homes and Interior decoration. Due to some exceptional properties of Rapakivi Granite and Arkose, they have various applications in construction industry. The uses of Rapakivi Granite in construction industry include As dimension stone and that of Arkose include Cement manufacture, Construction aggregate, For road aggregate, Production of glass and ceramics, Raw material for the manufacture of mortar.

More about Rapakivi Granite and Arkose

Here you can know more about Rapakivi Granite and Arkose. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Rapakivi Granite and Arkose consists of mineral content and compound content. The mineral content of Rapakivi Granite includes Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz and mineral content of Arkose includes Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz. You can also check out the list of all Igneous Rocks. When we have to compare Rapakivi Granite vs Arkose, the texture, color and appearance plays an important role in determining the type of rock. Rapakivi Granite is available in black, grey, orange, pink, white colors whereas, Arkose is available in reddish brown colors. Appearance of Rapakivi Granite is Veined or Pebbled and that of Arkose is Rough and Dull. Properties of rock is another aspect for Rapakivi Granite vs Arkose. Hardness of Rapakivi Granite and Arkose is 6-7. The types of Rapakivi Granite are Igneous Protolith Granite, Sedimentary Protolith Granite, Mantle Granite, Anorogenic Granite and Hybrid Granite whereas types of Arkose are Arkose. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Rapakivi Granite and Arkose is white. The specific heat capacity of Rapakivi Granite is 0.79 kJ/Kg K and that of Arkose is 0.78 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Rapakivi Granite is heat resistant, wear resistant whereas Arkose is heat resistant, impact resistant, pressure resistant.