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Obsidian is an igneous rock that forms when molten rock material cools so rapidly that atoms are unable to arrange themselves into a crystalline structure. It is an amorphous material known as a " mineraloid ." The result is a volcanic glass with a smooth uniform texture that breaks with a conchoidal fracture (see photo). Where Does Obsidian Form?
Obsidian (/ ə b ˈ s ɪ d i. ən, ɒ b-/ əb-SID-ee-ən ob-) is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.
May 28, 2024 · Obsidian is an igneous rock occurring as a natural glass that is formed by the rapid cooling of viscous lava from volcanoes. Where is obsidian found? Some of the best-known occurrences of obsidian are at Mount Hekla in Iceland, the Eolie Islands off the coast of Italy, and Obsidian Cliff in Yellowstone National Park, U.S.
May 2, 2018 · Obsidian is an extrusive igneous rock. It is occurring as a natural glass formed by the rapid cooling of viscous lava from volcanoes. Result of this formed, glass occupies more than 80 % and that have seeming conchoidal fracture and vitreous luster. It usually colours dark, black, grey-black to grey.
Aug 25, 2023 · Obsidian is a powerful stone with spiritual symbolism, practical uses and protective properties. It has the potential to reduce stress and anxiety, promote physical healing benefits and provide spiritual healing attributes.
Apr 26, 2024 · Obsidian is a volcanic glass formed from the rapid cooling of lava. Its distinctive properties include a smooth, glassy texture, and it often appears jet black but can also have hints of red, brown, or green.
Jun 23, 2023 · Obsidian is a hard, brittle, natural volcanic glass or mineraloid with a conchoidal fracture. It is not a mineral or crystal. However, it is often considered a volcanic or an extrusive igneous rock. Usually, obsidian is a rhyolite glass formed from rapid quenching viscous, silica-rich lava or magma.
Jan 11, 2024 · Obsidian is a naturally occurring volcanic glass and one of the most striking types of igneous rocks. This article delves into what obsidian is, its formation and composition, the...
Oct 28, 2014 · Obsidian is usually considered an extrusive rock, because it usually solidifies above Earth's surface where the edges of a lava flow come into contact with cool air or water. When most people think of obsidian, they think of a deep black, glassy stone.
Obsidian is a glassy, extrusive igneous rock with a felsic composition, and is typically black in color but may also be rust-red or display whiteish ‘snowflake’ inclusions. It often displays conchoidal fracturing with very sharp edges. Obsidian is made from the rapid cooling of silica-rich lava.
