Definition
Origin
Discoverer
Etymology
Class
Sub-Class
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Other Categories
Texture
Color
Maintenance
Durability
Water Resistant
Scratch Resistant
Stain Resistant
Wind Resistant
Acid Resistant
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Interior Uses
Exterior Uses
Other Architectural Uses
Construction Industry
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Antiquity Uses
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Types
Features
Monuments
Famous Monuments
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Famous Sculptures
Pictographs
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Figurines
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Formation
Mineral Content
Compound Content
Metamorphism
Types of Metamorphism
Weathering
Types of Weathering
Erosion
Types of Erosion
Hardness
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Porosity
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Asia
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Australia
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth
From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius
Durable Rock, Medium Hardness Rock
Black, Blue, Brown, Green, Orange, Red, Tan, Yellow
Decorative Aggregates, Interior Decoration
Arrowheads, Cutting Tool, Knives, Scrapers, Spear Points
Creating Artwork, Mirror, Used in aquariums
Fireworks Obsidian, Mahogany, Sheen Obsidian, Snowflake obsidian and Velvet Peacock Obsidian
Blocks negativity, Helps to protect against depression
When the lava is released from volcano, it undergoes a very rapid cooling which freezes the mechanisms of crystallization. The result is a volcanic glass with a uniform smooth texture.
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism
Biological Weathering, Chemical Weathering, Mechanical Weathering
Chemical Erosion, Coastal Erosion, Glacier Erosion
Heat Resistant, Impact Resistant
Afghanistan, Indonesia, Japan, Russia
Greece, Hungary, Iceland, Italy, Turkey
Argentina, Chile, Ecuador, Peru
Basalt is a common extrusive igneous rock formed by the rapid cooling of basaltic lava exposed at or very near the surface of Earth
From Late Latin Basaltes (variant of basanites ), very hard stone, which was imported from Ancient Greek Basanites
Durable Rock, Medium Hardness Rock
Fine Grained Rock, Opaque Rock
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
Black, Brown, Light to Dark Grey
Floor Tiles, Homes, Hotels, Kitchens
As Building Stone, Paving Stone, Garden Decoration, Office Buildings
Arrowheads, As Dimension Stone, Cobblestones, Cutting Tool, Rail Track Ballast, Roadstone
An Oil and Gas Reservoir, Commemorative Tablets, Creating Artwork, Used in aquariums
Alkaline Basalt, Boninite, High Alumina Basalt, Mid Ocean Ridge Basalt (MORB), Tholeiitic Basalt, Basaltic trachyandesite, Mugearite and Shoshonite
Has High structural resistance against erosion and climate, Very fine grained rock
Easter Island in the Polynesian Triangle, Pacific Ocean, Gateway of India in Mumbai, India, Gol Gumbaz in Karnataka, India
Basalt forms when lava reaches the Earth's surface near an active volcano. The temperature of lava is between 1100 to 1250° C when it gets to the surface.
Olivine, Plagioclase, Pyroxene
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Heat Resistant, Pressure Resistant, Wear Resistant