Definition
Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat
  
Diorite is a grey to dark-grey intermediate intrusive igneous rock composed principally of plagioclase feldspar,biotite, hornblende, and pyroxene
  
History
  
  
Origin
France
  
Unknown
  
Discoverer
Unknown
  
Unknown
  
Etymology
From French, Latin lignum wood + -ite1
  
From early 19th century coined in French, formed irregularly from Greek diorizein distinguish
  
Class
Sedimentary Rocks
  
Igneous Rocks
  
Sub-Class
Durable Rock, Soft Rock
  
Durable Rock, Hard Rock
  
Family
  
  
Group
Not Applicable
  
Plutonic
  
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
  
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
  
Texture
Amorphous, Glassy
  
Phaneritic
  
Color
Black, Brown, Dark Brown, Grey, Light to Dark Grey
  
Black, Brown, Light to Dark Grey, White
  
Maintenance
Less
  
Less
  
Durability
Durable
  
Durable
  
Water Resistant
No
  
No
  
Scratch Resistant
No
  
No
  
Stain Resistant
No
  
No
  
Wind Resistant
No
  
Yes
  
Acid Resistant
No
  
No
  
Appearance
Veined or Pebbled
  
Shiny
  
Architecture
  
  
Interior Uses
Not Yet Used
  
Decorative Aggregates, Interior Decoration
  
Exterior Uses
Not Yet Used
  
As Building Stone, As Facing Stone, Garden Decoration
  
Other Architectural Uses
Not Yet Used
  
Curbing
  
Industry
  
  
Construction Industry
for Road Aggregate, Steel Production
  
As Dimension Stone, Cement Manufacture, Cobblestones, Construction Aggregate, for Road Aggregate
  
Medical Industry
Not Yet Used
  
Not Yet Used
  
Antiquity Uses
Not Yet Used
  
Artifacts, Monuments, Sculpture, Small Figurines
  
Other Uses
  
  
Commercial Uses
Electricity Generation
  
Creating Artwork, Curling
  
Types
Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite
  
Not Available
  
Features
Generally rough to touch, Helps in production of Heat and Electricity, Used as fossil fuel
  
Typically speckled black and white.
  
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.
  
Diorite is a coarse-grained intrusive igneous rock which contains large interlocking and randomly oriented crystals and forms when molten lava does not reach the Earth’s surface and cools down in the Earth’s crust.
  
Composition
  
  
Mineral Content
Not Available
  
Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon
  
Compound Content
Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur
  
Silicon Dioxide
  
Transformation
  
  
Metamorphism
No
  
Yes
  
Types of Metamorphism
Not Applicable
  
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
  
Weathering
Yes
  
Yes
  
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
  
Biological Weathering, Chemical Weathering, Mechanical Weathering
  
Erosion
Yes
  
Yes
  
Types of Erosion
Chemical Erosion, Water Erosion, Wind Erosion
  
Chemical Erosion, Coastal Erosion, Water Erosion
  
Physical Properties
  
  
Hardness
1
  
6-7
  
Grain Size
Medium to Fine Coarse Grained
  
Medium to Coarse Grained
  
Fracture
Conchoidal
  
Not Available
  
Streak
Black
  
Bluish Black
  
Porosity
Highly Porous
  
Very Less Porous
  
Luster
Dull to Vitreous to Submetallic
  
Shiny
  
Compressive Strength
Not Available
  
225.00 N/mm
2
  
7
Cleavage
Non-Existent
  
Not Available
  
Toughness
Not Available
  
2.1
  
Specific Gravity
1.1-1.4
  
2.8-3
  
Transparency
Opaque
  
Opaque
  
Density
800-801 g/cm3
  
2.8-3 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
  
Not Yet Found
  
Africa
Botswana, Kenya, Morocco, Mozambique, South Africa, Tanzania
  
Egypt
  
Europe
Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom
  
Finland, Germany, Italy, Romania, Sweden, Turkey, United Kingdom
  
Others
Not Yet Found
  
Not Yet Found
  
Deposits in Western Continents
  
  
North America
Canada, Mexico, USA
  
USA
  
South America
Brazil, Chile, Colombia, Venezuela
  
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru
  
Deposits in Oceania Continent
  
  
Australia
New South Wales, Queensland, Victoria
  
New Zealand, Western Australia