Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Texture
Color
Maintenance
Durability
Water Resistant
Scratch Resistant
Stain Resistant
Wind Resistant
Acid Resistant
Appearance
Interior Uses
Exterior Uses
Other Architectural Uses
Construction Industry
Medical Industry
Antiquity Uses
Commercial Uses
Types
Features
Monuments
Famous Monuments
Sculpture
Famous Sculptures
Pictographs
Petroglyphs
Figurines
Fossils
Formation
Mineral Content
Compound Content
Metamorphism
Types of Metamorphism
Weathering
Types of Weathering
Erosion
Types of Erosion
Hardness
Grain Size
Fracture
Streak
Porosity
Luster
Compressive Strength
Cleavage
Toughness
Specific Gravity
Transparency
Density
Specific Heat Capacity
Resistance
Asia
Africa
Europe
Others
North America
South America
Australia
Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat
From French, Latin lignum wood + -ite1
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Black, Brown, Dark Brown, Grey, Light to Dark Grey
for Road Aggregate, Steel Production
Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite
Generally rough to touch, Helps in production of Heat and Electricity, Used as fossil fuel
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.
Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur
Biological Weathering, Chemical Weathering, Mechanical Weathering
Chemical Erosion, Water Erosion, Wind Erosion
Medium to Fine Coarse Grained
Dull to Vitreous to Submetallic
Bangladesh, Burma, Cambodia, China, India, Indonesia, Kazakhstan, Malaysia, Mongolia, Pakistan, Turkey, Vietnam
Botswana, Kenya, Morocco, Mozambique, South Africa, Tanzania
Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom
Brazil, Chile, Colombia, Venezuela
New South Wales, Queensland, Victoria
Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica
Western Australia, Minnesota
From the name of Taconic Mountains in New England
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Opaque Rock
Layered, Banded, Veined and Shiny
Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration
As Building Stone, Garden Decoration, Paving Stone
As Dimension Stone, Used for flooring, stair treads, borders and window sills.
As a touchstone, Cemetery Markers, Creating Artwork
Is one of the oldest rock
Taconite is a type of sedimentary rock formed when a river carries or transports pieces of broken rock as it flows. When the river reaches a lake or sea, its load of transported rocks settles or deposits at the bottom of sea or lake.
Hematite, Magnetite, Quartz
Fe, Iron(III) Oxide, Silicon Dioxide
Biological Weathering, Mechanical Weathering
Chemical Erosion, Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion
Uneven, Splintery or Conchoidal
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
China, India, Iran, Iraq, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam
Kenya, Morocco, South Africa, Tanzania
Austria, France, Greece, Italy, Malta, Poland, Portugal, Serbia, Spain, Sweden, United Kingdom
Greenland, Mid-Atlantic Ridge
New South Wales, Queensland, South Australia, Western Australia