Definition
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
Flint is a hard type of sedimentary rock that produces a small piece of burning material when hit by steel
Origin
Pennsylvania, U.S.
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Discoverer
Unknown
Unknown
Etymology
From Greek anthrakites, from anthrax, anthrak meaning coal
From Old English flint - a type of rock mainly known for high hardness and for giving off sparks when struck
Class
Metamorphic Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
Texture
Amorphous, Glassy
Banded, Rough
Color
Black, Brown, Dark Brown, Grey, Light to Dark Grey
Black, Brown, Green, Grey, Red, White
Durability
Durable
Durable
Appearance
Veined or Pebbled
Glassy or Pearly
Interior Uses
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Decorative Aggregates, Homes, Interior Decoration
Exterior Uses
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As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
Other Architectural Uses
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Curbing
Construction Industry
Cement Manufacture, for Road Aggregate, Making natural cement, Steel Production
Arrowheads, Cutting Tool, Spear Points
Medical Industry
In Chemical and Pharmaceutical Industry, Manufacture of Aspirins
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Antiquity Uses
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Artifacts
Commercial Uses
Alumina Refineries, Electricity Generation, Liquid Fuel, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Paper Industry
Creating Artwork, Gemstone, In fire-starting tools, Manufacture of tools, Metallurgical Flux, Jewelry, To ignite fire, Used in flintlock firearms
Types
Semi-anthracite and Meta-anthracite
Chert and Jasper
Features
Helps in production of Heat and Electricity, Used as fossil fuel
Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate
Archaeological Significance
Formation
Anthracite forms from the accumulation of plant debris in a swamp environment. When plant debris dies and falls into the swamp, the standing water of the swamp protects it from decay.
Flint is formed by the decomposition and compaction of various organisms such as sponges and diatoms under the water.
Mineral Content
Calcite, Clay, Clay Minerals
Silicon
Compound Content
Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur
Silicon Dioxide
Types of Metamorphism
Burial Metamorphism, Contact Metamorphism, Regional Metamorphism
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Types of Erosion
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Chemical Erosion, Coastal Erosion, Water Erosion
Grain Size
Medium to Fine Coarse Grained
Very fine-grained
Fracture
Conchoidal
Conchoidal
Porosity
Less Porous
Highly Porous
Specific Gravity
1.1-1.4
2.5-2.8
Transparency
Opaque
Translucent to Opaque
Density
1.25-2.5 g/cm3
2.7-2.71 g/cm3
Resistance
Heat Resistant, Water Resistant
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
Bangladesh, Burma, Cambodia, China, India, Indonesia, Kazakhstan, Malaysia, Mongolia, Pakistan, Turkey, Vietnam
Azerbaijan, China, Russia
Africa
Botswana, Kenya, Morocco, Mozambique, South Africa, Tanzania
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Europe
Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom
Austria, Belgium, Cyprus, Denmark, France, Germany, Italy, Malta, Netherlands, Poland, Portugal, Romania, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom
Deposits in Western Continents
North America
Canada, Mexico, USA
USA
South America
Brazil, Chile, Colombia, Venezuela
Bolivia
Deposits in Oceania Continent
Australia
New South Wales, Queensland, Victoria
New Zealand, South Australia
All about Anthracite and Flint Properties
Know all about Anthracite and Flint properties here. All properties of rocks are important as they define the type of rock and its application. Anthracite belongs to Metamorphic Rocks while Flint belongs to Sedimentary Rocks.Texture of Anthracite is Amorphous, Glassy whereas that of Flint is Banded, Rough. Anthracite appears Veined or Pebbled and Flint appears Glassy or Pearly. The luster of Anthracite is shiny while that of Flint is vitreous. Anthracite is available in black, brown, dark brown, grey, light to dark grey colors whereas Flint is available in black, brown, green, grey, red, white colors. The commercial uses of Anthracite are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry and that of Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms.