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
Rhyolite is a fine-grained igneous rock which is rich in silica
From German Rhyolit, from Greek rhuax lava stream + lithos stone
Coarse Grained Rock, Opaque Rock
Aphanitic, Glassy, Porphyritic
Decorative Aggregates, Homes, Hotels, Interior Decoration, Kitchens
As Building Stone, As Facing Stone, Paving Stone, Office Buildings
Arrowheads, As Dimension Stone, Building houses or walls, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives
Gemstone, Laboratory bench tops, Jewelry
Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.
Acidic in nature, Available in lots of colors
Rhyolite is a felsic extrusive rock and due to its high silica content, rhyolite lava is very viscous and is volcanic equivalent of granite.
Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide, Sodium
Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism
Biological Weathering, Chemical Weathering, Mechanical Weathering
Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion
Heat Resistant, Wear Resistant
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
Germany, Iceland, Ireland, Italy, Spain
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
New Zealand, Queensland, Western 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