Dec 1, 2024 · Discover 20 fascinating facts about obsidian, a natural volcanic glass with unique properties and cultural significance. Explore its formation, uses, and more.

Obsidian (/ əbˈsɪdi.ən, ɒb -/ əb-SID-ee-ən ob-) [5] is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous …

Dec 6, 2024 · obsidian, igneous rock occurring as a natural glass formed by the rapid cooling of viscous lava from volcanoes. Obsidian is extremely rich in silica (about 65 to 80 percent), is …

Mar 26, 2022 · Obsidian can be found across wide parts of the United States, but it’s not well understood. Ready to learn a bit about this shiny volcanic glass? Let’s get right to it and dig …

Nov 8, 2023 · 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 …

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 …

Oct 1, 2024 · Obsidian 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 …

Obsidian is an extrusive rock that erupted out of a volcano. Most volcanic rocks are rough and jagged because they contain gas bubbles. But obsidian is smooth because it contains mostly …

Obsidian is an "extrusive” rock, which means it is made from magma that erupted out of a volcano. If it was an igneous rock that formed from magma underground and did not erupt, it …

Nov 26, 2018 · Obsidian is a naturally occurring amorphous product of fast cooling magma. Learn more about the formation, production, and uses of obsidian.