Rapakivi Granite Rock | History

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

Granular, Phaneritic

Color

Black, Grey, Orange, Pink, White

Maintenance

Durability

Durable

Water Resistant

✔ ✘

81% - Igneous Rocks Rocks have it !

Scratch Resistant

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86% - Igneous Rocks Rocks have it !

Stain Resistant

✔ ✘

66% - Igneous Rocks Rocks have it !

Wind Resistant

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49% - Igneous Rocks Rocks

Acid Resistant

✔ ✘

48% - Igneous Rocks Rocks have it !

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

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

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

✔ ✘

97% - Igneous Rocks Rocks have it !

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

99% - Igneous Rocks Rocks have it !

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

92% - Igneous Rocks Rocks have it !

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

6-7

1 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

Rank: 20 (Overall)

0.15 450

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Cleavage

Toughness

Specific Gravity

2.6-2.7

0 8.4

👆🏻

Transparency

Opaque

Density

2.6-2.8 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K

Rank: 17 (Overall)

0.14 3.2

👆🏻

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