Definition
Definition
Pegmatite rock is a holocrystalline, intrusive igneous rock which is composed of interlocking phaneritic crystals
History
Origin
-
Discoverer
R. J. Hauy
Etymology
From Greek pegma, pegmat which means- thing joined together + -ite
Class
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Family
Group
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Texture
Texture
Pegmatitic
Color
Black, Brown, Cream, Green, Grey, Pink, Red, Rust, Silver, White, Yellow
Maintenance
Less
Durability
Durable
Water Resistant
✔
✘
81% - Igneous Rocks Rocks have it !
Scratch Resistant
✔
✘
86% - Igneous Rocks Rocks have it !
Stain Resistant
✔
✘
66% - Igneous Rocks Rocks have it !
Wind Resistant
✔
✘
49% - Igneous Rocks Rocks
Acid Resistant
✔
✘
48% - Igneous Rocks Rocks
Appearance
Layered, Banded, Veined and Shiny
Uses
Architecture
Interior Uses
Decorative Aggregates, Flooring, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Paving Stone
Other Architectural Uses
Curbing
Industry
Construction Industry
As Dimension Stone, Building houses or walls, Construction Aggregate, for Road Aggregate, Landscaping
Medical Industry
-
Antiquity Uses
Artifacts, Sculpture, Small Figurines
Other Uses
Commercial Uses
Creating Artwork, Jewelry, Source of corundum, tourmalines, beryls and topaz
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
Archaeological Significance
Monuments
-
Famous Monuments
-
Sculpture
-
Famous Sculptures
-
Pictographs
-
Petroglyphs
-
Figurines
-
Fossils
Absent
Formation
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
Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, Phosphorus Pentoxide
Transformation
Metamorphism
✔
✘
97% - Igneous Rocks Rocks have it !
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional 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, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Properties
Physical Properties
Hardness
7
1
7
👆🏻
Grain Size
Medium to Coarse Grained
Fracture
Conchoidal
Streak
White
Porosity
Less Porous
Luster
Grainy, Pearly and Vitreous
Compressive Strength
178.54 N/mm2
Rank: 19 (Overall)
0.15
450
👆🏻
Cleavage
Perfect
Toughness
2.1
Specific Gravity
2.6-2.63
0
8.4
👆🏻
Transparency
Translucent to Opaque
Density
2.6-2.65 g/cm3
0
1400
👆🏻
Thermal Properties
Specific Heat Capacity
0.79 kJ/Kg K
Rank: 17 (Overall)
0.14
3.2
👆🏻
Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
Reserves
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
-
Deposits in Western Continents
North America
Canada
South America
Brazil
Deposits in Oceania Continent
Australia
New South Wales, Queensland, South Australia, Western Australia