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Volcanic glass does not technically contain mineral crystals. The definition of a mineral requires a crystalline structure. Secondly, the chemical composition of volcanic glass could vary widely. Minerals have definite parameters for chemical composition.
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Is volcanic glass a mineral group?
No. By definition, a mineral must have a crystalline structure. Glass does not have a crystalline structure.
Why is glass marble not considered a mineral?
In order to be a mineral, substances need to have fixed internal crystalline structure. Natural glass does not.
What mineral forms glass?
The mineral quartz is the main ingredient in manufactured glass.
What is the igneous rock that cooled too quickly for a crystal structure to form?
Volcanic glass or obsidian is a quickly cooled igneous rock without a mineral crystal structure.
Why does obsidian contain few or no mineral grains?
The material that would normally form mineral crystals does not have time to form a crystalline structure because of very rapid cooling after volcanically erupting into the air or onto the surface. Obsidian is a volcanic glass.
Is volcanic glass a mineral?
Volcanic glass is not a mineral. It's composition is complex, and their is no crystalline structure.
Is volcanic glass a mineral group?
No. By definition, a mineral must have a crystalline structure. Glass does not have a crystalline structure.
Extremely rapid cooling lavA in which no crystals form?
the reterded mineral
What minerals make up volcanic glass?
No minerals make up true volcanic glass, as the crystalline structure of minerals did not have time to form before the lava hardened. A mineral must have a crystalline structure.
What is the hardness of a volcanic rock?
That varies widely between different types of volcanic rock. Obsidian or volcanic glass, is harder then pumice, but both are volcanic rocks.
Is tuff a mineral?
No. Tuff is an igneous rock. it contains a number of minerals as well as volcanic ash and pumice, which are forms of volcaninc glass.
What is sometimes known as volcanic glass?
Obsidian is a glass of volcanic origin.
What igneous rock has crystals that are not visible?
Extrusive igneous rock consists of mineral crystals that are not observable with the naked eye. Obsidian is an extrusive igneous rock (volcanic glass) where there technically are no mineral crystals.
Must all rocks form crystals?
All rock does not contain mineral crystals. Obsidian, or volcanic glass, in particular is a rock that has cooled so quickly from lava that mineral crystals were not able to form.
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 mineral has a hardness of 5 Mohs scale nad can be scratched by a steel?
apatite, cobalt, zirconium, palladium, tooth enamel, obsidian (volcanic glass)
