Definition
Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat
  
Amphibolite can be defined as a granular metamorphic rock which mainly consist of hornblende and plagioclase
  
History
  
  
Origin
France
  
Unknown
  
Discoverer
Unknown
  
Alexandre Brongniart
  
Etymology
From French, Latin lignum wood + -ite1
  
From Amphibole + -ite
  
Class
Sedimentary Rocks
  
Metamorphic Rocks
  
Sub-Class
Durable Rock, Soft Rock
  
Durable Rock, Hard Rock
  
Family
  
  
Group
Not Applicable
  
Not Applicable
  
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
  
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
  
Texture
Amorphous, Glassy
  
Banded, Foliated, Massive
  
Color
Black, Brown, Dark Brown, Grey, Light to Dark Grey
  
Black, Brown, Green, Grey
  
Maintenance
Less
  
Less
  
Durability
Durable
  
Durable
  
Water Resistant
No
  
Yes
  
Scratch Resistant
No
  
Yes
  
Stain Resistant
No
  
Yes
  
Wind Resistant
No
  
No
  
Acid Resistant
No
  
Yes
  
Appearance
Veined or Pebbled
  
Foliated
  
Architecture
  
  
Interior Uses
Not Yet Used
  
Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Homes, Hotels, Kitchens
  
Exterior Uses
Not Yet Used
  
As Building Stone, As Facing Stone, Paving Stone, Office Buildings
  
Other Architectural Uses
Not Yet Used
  
Curbing
  
Industry
  
  
Construction Industry
for Road Aggregate, Steel Production
  
As Dimension Stone, Building houses or walls, Cobblestones, Construction Aggregate, for Road Aggregate, Landscaping, Production of Glass and Ceramics, Roadstone
  
Medical Industry
Not Yet Used
  
Not Yet Used
  
Antiquity Uses
Not Yet Used
  
Artifacts, Sculpture, Small Figurines
  
Other Uses
  
  
Commercial Uses
Electricity Generation
  
Cemetery Markers, Commemorative Tablets, Creating Artwork
  
Types
Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite
  
Hornblendite
  
Features
Generally rough to touch, Helps in production of Heat and Electricity, Used as fossil fuel
  
Clasts are smooth to touch, Matrix variable, Surfaces are often shiny
  
Archaeological Significance
  
  
Monuments
Not Yet Used
  
Used
  
Famous Monuments
Not Applicable
  
Data Not Available
  
Sculpture
Not Yet Used
  
Used
  
Famous Sculptures
Not Applicable
  
Data Not Available
  
Pictographs
Used
  
Not Used
  
Petroglyphs
Used
  
Not Used
  
Figurines
Not Yet Used
  
Used
  
Fossils
Present
  
Absent
  
Formation
Coal formation takes place due to accumulation of plant debris in a swamp environment. The Coal formation process continues, as peat turns into lignite brown or black coal at increasing heat and pressure.
  
Amphibolite is a coarse-grained metamorphic rock which forms by metamorphism of mafic igneous rocks like basalt and gabbro or from the metamorphism of clay-rich sedimentary rocks like marl or graywacke.
  
Composition
  
  
Mineral Content
Not Available
  
Amphibole, Andalusite, Biotite, Calcite, Epidote, Garnet, Hornblade, Kyanite, Magnetite, Olivine, Plagioclase, Pyroxene, Staurolite, Wollastonite
  
Compound Content
Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur
  
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
  
Transformation
  
  
Metamorphism
No
  
No
  
Types of Metamorphism
Not Applicable
  
Not Applicable
  
Weathering
Yes
  
Yes
  
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
  
Chemical Weathering, Mechanical Weathering
  
Erosion
Yes
  
Yes
  
Types of Erosion
Chemical Erosion, Water Erosion, Wind Erosion
  
Chemical Erosion, Glacier Erosion, Sea Erosion, Wind Erosion
  
Physical Properties
  
  
Hardness
1
  
6-7
  
Grain Size
Medium to Fine Coarse Grained
  
Medium to Coarse Grained
  
Fracture
Conchoidal
  
Irregular to Conchoidal
  
Streak
Black
  
White to Grey
  
Porosity
Highly Porous
  
Less Porous
  
Luster
Dull to Vitreous to Submetallic
  
Vitreous to Dull
  
Cleavage
Non-Existent
  
Irregular
  
Toughness
Not Available
  
2.3
  
Specific Gravity
1.1-1.4
  
2.5
  
Transparency
Opaque
  
Opaque
  
Density
800-801 g/cm3
  
2.85-3.07 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
1.26 kJ/Kg K
  
5
Not Available
  
Resistance
Heat Resistant
  
Heat Resistant, Pressure Resistant, Wear Resistant
  
Deposits in Eastern Continents
  
  
Asia
Bangladesh, Burma, Cambodia, China, India, Indonesia, Kazakhstan, Malaysia, Mongolia, Pakistan, Turkey, Vietnam
  
Russia, Turkey
  
Africa
Botswana, Kenya, Morocco, Mozambique, South Africa, Tanzania
  
Burundi, Djibouti, Eritrea, Ethiopia, Kenya, Madagascar, Rwanda, Somalia, South Africa, Sudan, Tanzania, Uganda
  
Europe
Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom
  
Germany, Greece, Iceland, Norway, Poland
  
Others
Not Yet Found
  
Not Yet Found
  
Deposits in Western Continents
  
  
North America
Canada, Mexico, USA
  
Canada, USA
  
South America
Brazil, Chile, Colombia, Venezuela
  
Brazil
  
Deposits in Oceania Continent
  
  
Australia
New South Wales, Queensland, Victoria
  
South Australia, Western Australia
  
Lignite vs Amphibolite Characteristics
Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Lignite vs Amphibolite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Lignite and Properties of Amphibolite. Learn more about Lignite vs Amphibolite in the next section. The interior uses of Lignite include Not yet used whereas the interior uses of Amphibolite include Countertops, Decorative aggregates, Entryways, Floor tiles, Flooring, Homes, Hotels and Kitchens. Due to some exceptional properties of Lignite and Amphibolite, they have various applications in construction industry. The uses of Lignite in construction industry include For road aggregate, Steel production and that of Amphibolite include As dimension stone, Building houses or walls, Cobblestones, Construction aggregate, For road aggregate, Landscaping, Production of glass and ceramics, Roadstone.
More about Lignite and Amphibolite
Here you can know more about Lignite and Amphibolite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Lignite and Amphibolite consists of mineral content and compound content. The mineral content of Lignite is not available and mineral content of Amphibolite includes Amphibole, Andalusite, Biotite, Calcite, Epidote, Garnet, Hornblade, Kyanite, Magnetite, Olivine, Plagioclase, Pyroxene, Staurolite, Wollastonite. You can also check out the list of all Sedimentary Rocks. When we have to compare Lignite vs Amphibolite, the texture, color and appearance plays an important role in determining the type of rock. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas, Amphibolite is available in black, brown, green, grey colors. Appearance of Lignite is Veined or Pebbled and that of Amphibolite is Foliated. Properties of rock is another aspect for Lignite vs Amphibolite. The hardness of Lignite is 1 and that of Amphibolite is 6-7. The types of Lignite are Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite whereas types of Amphibolite are Hornblendite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Lignite is black while that of Amphibolite is white to grey. The specific heat capacity of Lignite is 1.26 kJ/Kg K and that of Amphibolite is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Lignite is heat resistant whereas Amphibolite is heat resistant, pressure resistant, wear resistant.