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 0
From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius 0
Durable Rock, Medium Hardness Rock 0
Black, Blue, Brown, Green, Orange, Red, Tan, Yellow 0
Decorative Aggregates, Interior Decoration 0
Arrowheads, Cutting Tool, Knives, Scrapers, Spear Points 0
Creating Artwork, Mirror, Used in aquariums 0
Fireworks Obsidian, Mahogany, Sheen Obsidian, Snowflake obsidian and Velvet Peacock Obsidian 0
Blocks negativity, Helps to protect against depression 0
Archaeological Significance
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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. 0
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide 0
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism 0
Biological Weathering, Chemical Weathering, Mechanical Weathering 0
Chemical Erosion, Coastal Erosion, Glacier Erosion 0
Heat Resistant, Impact Resistant 0
Deposits in Eastern Continents
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Afghanistan, Indonesia, Japan, Russia 0
Greece, Hungary, Iceland, Italy, Turkey 0
Deposits in Western Continents
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Argentina, Chile, Ecuador, Peru 0
Deposits in Oceania Continent
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Information about Obsidian
Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Obsidian Uses. We have provided you with all information about Obsidian rock here. 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. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Obsidian is white. Get to know more about Obsidian rock and characteristics of Obsidian rock in the next sections.