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Rapakivi Granite Rock



Definition

Definition
Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase

History

Origin
Finland, Europe

Discoverer
Jakob Sederholm

Etymology
From Finnish Rapakivi which stands for crumbly rock

Class
Igneous Rocks

Sub-Class
Durable Rock, Hard Rock

Family

Group
Plutonic

Other Categories
Coarse Grained Rock, Opaque Rock

Texture

Texture
Granular, Phaneritic

Color
Black, Grey, Orange, Pink, White

Maintenance
More

Durability
Durable

Water Resistant
Yes

Scratch Resistant
Yes

Stain Resistant
Yes

Wind Resistant
No

Acid Resistant
Yes

Appearance
Veined or Pebbled

Uses

Architecture

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

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

Other Architectural Uses
-

Industry

Construction Industry
As Dimension Stone

Medical Industry
-

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Laboratory bench tops, Tombstones

Types

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

Features
Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock

Archaeological Significance

Monuments
-

Famous Monuments
-

Sculpture
-

Famous Sculptures
-

Pictographs
-

Petroglyphs
-

Figurines
-

Fossils
Absent

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

Composition

Mineral Content
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz

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

Transformation

Metamorphism
Yes

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering
Yes

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion
Yes

Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness
6-7

Grain Size
Large and Coarse Grained

Fracture
-

Streak
White

Porosity
Less Porous

Luster
Dull to Grainy with Sporadic parts Pearly and Vitreous

Compressive Strength
175.00 N/mm2 20

Cleavage
-

Toughness
-

Specific Gravity
2.6-2.7

Transparency
Opaque

Density
2.6-2.8 g/cm3

Thermal Properties

Specific Heat Capacity
0.79 kJ/Kg K 17

Resistance
Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam

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

Europe
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic

Others
-

Deposits in Western Continents

North America
Canada, USA

South America
-

Deposits in Oceania Continent

Australia
-

Definition >>
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Igneous Rocks

Information about Rapakivi Granite

Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Rapakivi Granite Uses. We have provided you with all information about Rapakivi Granite rock here. Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase. Rapakivi Granite is available in black, grey, orange, pink, white colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Rapakivi Granite is white. Get to know more about Rapakivi Granite rock and characteristics of Rapakivi Granite rock in the next sections.

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