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Natural glass can be made by combining sandstone, limestone and lime under high heat until it melts, pouring in into a mould and allowing it to cool slowly, or by picking a globule up on a hollow tube and blowing into it to make a bubble.
Glass made by this method tends to be of a poor quality, with inclusions (floaties) and air bubbles. It also tends to be exceptionally brittle if it cools unevenly.
Dale K. London
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What type of rock is siliceous volcanic glass?
Siliceous volcanic glass is also known as obsidian.
What is true about volcanic glass?
Volcanic glass is the amorphous (uncrystallized) product of rapidly cooling magma.
Are arrowheads made from sedimentary rocks?
Arrowheads can be made of metal, bone, chert and flint (sedimentary rocks), or obsidian (volcanic glass).
What is the common name for obsidian rock?
Volcanic glass, or pumice (vesicular obsidian).
What rocks are volcanoes made up of?
Solid Rock and Magma
What is a Aztec War Club made of?
it is made of wood and volcanic glass obsidian
What is sometimes known as volcanic glass?
Obsidian is a glass of volcanic origin.
Are the atoms in volcanic glass organized or disorganized?
The atoms in volcanic glass are highly disorganized.
What type of rock is volcanic glass?
Siliceous volcanic glass is also known as obsidian.
What type of rock is siliceous volcanic glass?
Siliceous volcanic glass is also known as obsidian.
What is true about volcanic glass?
Volcanic glass is the amorphous (uncrystallized) product of rapidly cooling magma.
Is volcanic glass a mineral?
Volcanic glass is not a mineral. It's composition is complex, and their is no crystalline structure.
What is considered to be volcanic glass?
Obsidian, due to its glassy texture made from the super-cooling process.
Are arrowheads made from sedimentary rocks?
Arrowheads can be made of metal, bone, chert and flint (sedimentary rocks), or obsidian (volcanic glass).
Is volcanic glass full of air spaces?
Not necessarily. Scoria and pumice are forms of volcanic glass that contain air spaces, while obsidian, another volcanic glass, contains minimal air spaces if any.
Is volcanic glass a Granite?
No. Granite cools from magma deep underground. Volcanic glass cools quickly at or near the surface.
What is the common name for obsidian rock?
Volcanic glass, or pumice (vesicular obsidian).
