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Obsidian, or "volcanic glass," is made when molten rock comes out of a volcano and cools so quickly that no crystalline structure has time to form. This makes obsidian an extrusive igneous rock. The cooling occurs right at the surface.

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12y ago

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Is obsidian glass?

Obsidian is a natural glass.


What is a Aztec War Club made of?

it is made of wood and volcanic glass obsidian


What is the common name for obsidian rock?

The common name for obsidian rock is volcanic glass.


Is obsidian extrusive rock?

No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.


Can you melt obsidian to create glass objects?

Yes, obsidian can be melted to create glass objects. Obsidian is a natural volcanic glass that can be heated to high temperatures to become molten and then shaped into various glass objects.


What is the obsidian rock type?

Obsidian is an extrusive felsic igneous rock.


Does an obsidian rock have minerals you can see with magnification?

No, obsidian is volcanic glass.


What is considered to be volcanic glass?

Obsidian, due to its glassy texture made from the super-cooling process.


What is the scientific name for obsidian?

Other names for obsidian is Apache tears, volcanic glass, and Black obsidian.


Is obsidian rock or gemstone?

Obsidian is an extrusive igneous rock. Volcanic in origin, it is very common in recent lava flows. Obsidian is primarily made of glass. Obsidian is amorphous, lacking any crystal structure found in gemstones. For more details, try asking the question - "What is obsidian"


How can you tell obsidian is an igneous rock?

Obsidian is a form of glass. Glass can only form when material cools from a molten state.


Is Obsidian known as volcanic glass?

Yes, Obsidian is known as volcanic glass. It is a natural glass formed from rapidly cooled lava, typically from volcanoes. Obsidian has a shiny appearance and is commonly used in jewelry and tools due to its sharp edges when fractured.