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Pegmatite Rock

Types of Hard Rocks

Novaculite
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Pegmatite Definition

Definition
Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals

History of Pegmatite

Origin
Unknown
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Discoverer
R. J. Hauy

Etymology
From Greek pegma, pegmat which means- thing joined together + -ite

Class
Igneous Rocks
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Sub-Class
Durable Rock, Hard Rock
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Pegmatite Family

Group
Plutonic

Other Categories
Coarse Grained Rock, Opaque Rock

Pegmatite Texture

Texture
Pegmatitic
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Pegmatite Color
Black, Brown, Cream, Green, Grey, Pink, Red, Rust, Silver, White, Yellow

Maintenance
Less
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Durability
Durable

Water Resistant
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Scratch Resistant
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Stain Resistant
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Wind Resistant
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Acid Resistant
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Appearance
Layered, Banded, Veined and Shiny
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Pegmatite Uses

Architecture

Interior Uses
Decorative Aggregates, Flooring, Interior Decoration
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Exterior Uses
As Building Stone, As Facing Stone, Paving Stone
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Other Architectural Uses
Curbing

Industry

Construction Industry
As Dimension Stone, Building houses or walls, Construction Aggregate, for Road Aggregate, Landscaping

Medical Industry
Not Yet Used

Antiquity Uses
Artifacts, Sculpture, Small Figurines
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Other Uses

Commercial Uses
Creating Artwork, Jewelry, Source of corundum, tourmalines, beryls and topaz
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Pegmatite Types

Types
Granite Pegmatite, Gabbro Pegmatite and Diorite Pegmatite

Features
Generally rough to touch, Is one of the oldest rock, Source of corundum, tourmalines, beryls and topaz
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Archaeological Significance of Pegmatite

Monuments
Not Yet Used

Famous Monuments
Not Applicable

Sculpture
Used

Famous Sculptures
Data Not Available

Pictographs
Not Used

Petroglyphs
Not Used

Figurines
Used

Fossils
Absent

Formation of Pegmatite

Formation
Pegmatite rock is holocrystalline, intrusive igneous rock which is formed by partial melting and dewatering during the process of metamorphism.

Composition

Mineral Content
Apatite, Beryl, Feldspar, Fluorite, Garnet, Lepidolite, Quartz, Silica, Spodumene, Topaz
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Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, Phosphorus Pentoxide
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Transformation

Metamorphism

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

Weathering

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

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

Properties of Pegmatite

Physical Properties of Pegmatite

Hardness
7

Grain Size
Medium to Coarse Grained
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Fracture
Conchoidal
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Streak
White
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Porosity
Less Porous
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Luster
Grainy, Pearly and Vitreous
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Compressive Strength
178.54 N/mm2
13
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Cleavage
Perfect
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Toughness
2.1

Specific Gravity
2.6-2.63

Transparency
Translucent to Opaque
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Density
2.6-2.65 g/cm3

Thermal Properties of Pegmatite

Specific Heat Capacity
Not Available
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Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
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Pegmatite Reserves

Pegmatite Deposits in Eastern Continents

Asia
China, India, Iran, Japan, Nepal, North Korea, Russia, Saudi Arabia, South Korea

Africa
South Africa

Europe
Austria, France, Greece, Ireland, Italy, Netherlands, Slovakia, Spain, Turkey, Ukraine

Others
Not Yet Found

Pegmatite Deposits in Western Continents

North America
Canada

South America
Brazil

Pegmatite Deposits in Oceania Continent

Australia
New South Wales, Queensland, South Australia, Western Australia

Information about Pegmatite

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 Pegmatite Uses. We have provided you with all information about Pegmatite rock here. Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals. Pegmatite is available in black, brown, cream, green, grey, pink, red, rust, silver, white, yellow colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Pegmatite is white. Get to know more about Pegmatite rock and characteristics of Pegmatite rock in the next sections.

Characteristics of Pegmatite

Many rocks have distinct characteristics. Some of the Properties of Pegmatite are hardness, structure, streak, fracture etc. Pegmatite is significant as it is composed of minerals and has variety of uses in our day to day life. The characteristics of Pegmatite plays an important role in its identification. The hardness of Pegmatite is 7 on Moh’s hardness scale. Rocks according to their hardness are divided into:Hard Rocks, Soft Rocks and Rocks with Medium Hardness. Fracture of Pegmatite rock is conchoidal. Its specific heat capacity is Not Available. Pegmatite is heat resistant, impact resistant, pressure resistant. Some of its uses are:

  • Interior Uses: Decorative aggregates, Flooring and Interior decoration.
  • Construction Industry: As dimension stone, Building houses or walls, Construction aggregate, For road aggregate, Landscaping.

Know more about Pegmatite rock in the next section.

More About Pegmatite

Pegmatite is a type of Igneous Rocks. The color of rock is one of its important property. Pegmatite rock is available in black, brown, cream, green, grey, pink, red, rust, silver, white, yellow colors. It is Layered, Banded, Veined and Shiny in appearance. The Pegmatite mineral content includes Apatite, Beryl, Feldspar, Fluorite, Garnet, Lepidolite, Quartz, Silica, Spodumene, Topaz. Its compound content includes Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, Phosphorus Pentoxide. Let’s move on to the types of Pegmatite. The types of Pegmatite include Granite Pegmatite, Gabbro Pegmatite and Diorite Pegmatite. Fossils are the remains of prehistoric plants or animals which are embedded in rock and preserved in petrified form. Fossils are found only in sedimentary rocks. As Pegmatite belongs to Igneous Rocks, fossils are not found in it.