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Volcanic glass is not a mineral. It's composition is complex, and their is no crystalline structure.
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∙ 15y ago
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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.
What mineral can scratch glass but not steel file?
n
Is obsidian extrusive rock?
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
What mineral is used in making glass and laundry detergents?
phosphate
Is calcite a mineral and why?
By definition, a mineral must have a definite crystalline structure. Calcite has this. Glass is amorphous, meaning it does not have such a structure.
How is volcanic glass different from a mineral?
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.
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.
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.
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)
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.
