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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Learn more about Properties of Obsidian
What is Obsidian? In this section, we will learn more about properties of Obsidian i.e. physical and thermal properties. Physical properties of Obsidian include Color, Streak, Hardness, Structure, Cleavage, Fracture, Luster, Specific Gravity etc. The strength of Obsidian is 0.15 N/mm2. Streak of Obsidian is white while its cleavage is non-existent. Luster of Obsidian is vitreous and its fracture is conchoidal. Obsidian is translucent in nature. Know all about Obsidian, What is Obsidian, its composition, features, facts and reserves in next sections.
Know about Composition of Obsidian
What is Obsidian composed of? Get to know about composition of Obsidian here. Obsidian definition gives information about the Formation of Obsidian and its composition.The composition of Obsidian can be further divided into mineral and compound content. The mineral content of Obsidian rock includes Not Available and The compound content of Obsidian rock includes Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide. Almost all rocks undergo transformation process. Know all about Obsidian rock in next section.