Rapakivi Granite

Gritstone

Rapakivi Granite and Gritstone

Rapakivi Granite

Gritstone

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1 Definition

1.1 Definition

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

Gritstone or grit is a hard, coarse-grained, siliceous sandstone

1.2 History

1.2.1 Origin

Finland, Europe

Pennines, England

1.2.2 Discoverer

Jakob Sederholm

J.J. Ferber

1.3 Etymology

From Finnish Rapakivi which stands for crumbly rock

From Grit + Stone

1.4 Class

Igneous Rocks

Sedimentary Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Plutonic

Not Applicable

1.6 Other Categories

Coarse Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Granular, Phaneritic

Earthy

2.2 Color

Black, Grey, Orange, Pink, White

Beige, Black, Brown, Colourless, Cream, Dark Brown, Green, Grey, Light Green, Light to Dark Grey, Pink, Red, White, Yellow

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Veined or Pebbled

Layered and Foliated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

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

Countertops, Decorative Aggregates, Homes, Interior Decoration

3.1.2 Exterior Uses

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

As Building Stone, Garden Decoration, Office Buildings, Paving Stone

3.1.3 Other Architectural Uses

Not Yet Used

Curbing

3.2 Industry

3.2.1 Construction Industry

As Dimension Stone

Construction Aggregate, Roadstone

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

3.4 Other Uses

3.4.1 Commercial Uses

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

An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner, Source of Magnesia (MgO), Tombstones

4 Types

4.1 Types

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

Not Available

4.2 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, Very fine grained rock

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Data Not Available

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

4.3.5 Pictographs

Not Used

4.3.6 Petroglyphs

Not Used

4.3.7 Figurines

Used

4.4 Fossils

Absent

Present

5 Formation

5.1 Formation

Granite is an igneous rock which is very hard, crystalline and is visibly homogeneous in texture and forms by melting of continental rocks

Gritstone is a type of sedimentary rock which was formed on the floors of wide river deltas where the grit deposits were laid down, with every tide or flood dumping another layer of sediment.

5.2 Composition

5.2.1 Mineral Content

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

Calcite, Clay Minerals, Feldspar, Micas, Quartz

5.2.2 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

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Not Applicable

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6-76-7

1 7

6.1.2 Grain Size

Large and Coarse Grained

Coarse Grained

6.1.3 Fracture

Not Available

Conchoidal

6.1.4 Streak

White

6.1.5 Porosity

Less Porous

Highly Porous

6.1.6 Luster

Dull to Grainy with Sporadic parts Pearly and Vitreous

Dull

6.1.7 Compressive Strength

175.00 N/mm²70.00 N/mm²

0.15 450

6.1.8 Cleavage

Not Available

Perfect

6.1.9 Toughness

Not Available

6.1.10 Specific Gravity

2.6-2.72.250

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

2.6-2.8 g/cm³2.2 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

0.79 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

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

China, India, Kazakhstan, Mongolia, Russia, Uzbekistan

7.1.2 Africa

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

Namibia, Nigeria, South Africa

7.1.3 Europe

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

Austria, Denmark, Germany, Great Britain, Netherlands, Poland, Sweden, Switzerland, United Kingdom

7.1.4 Others

Not Yet Found

Greenland

7.2 Deposits in Western Continents

7.2.1 North America

Canada, USA

7.2.2 South America

Not Yet Found

Brazil

7.3 Deposits in Oceania Continent

7.3.1 Australia

Not Yet Found

New South Wales, New Zealand, Western Australia

All about Rapakivi Granite and Gritstone Properties

Know all about Rapakivi Granite and Gritstone properties here. All properties of rocks are important as they define the type of rock and its application. Rapakivi Granite belongs to Igneous Rocks while Gritstone belongs to Sedimentary Rocks.Texture of Rapakivi Granite is Granular, Phaneritic whereas that of Gritstone is Earthy. Rapakivi Granite appears Veined or Pebbled and Gritstone appears Layered and Foliated. The luster of Rapakivi Granite is dull to grainy with sporadic parts pearly and vitreous while that of Gritstone is dull. Rapakivi Granite is available in black, grey, orange, pink, white colors whereas Gritstone is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Rapakivi Granite are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, tombstones and that of Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones.