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What is the luster of scoria rock?

Scoria rock generally has a dull to glassy luster. It can appear shiny if it has a vesicular texture with many cavities reflecting light, but overall its luster is not as shiny as some other volcanic rocks like obsidian.


What texture does obsidian have?

A glassy texture.


What texture of obsidian?

Obsidian is an extrusive rock that cooled very rapidly without forming crystals. As a result, obsidian has a smooth, shiny texture of a thick piece of glass.


How can you tell that scoria is an extrusive rock?

It is fine grained to glassy and contains vesicles.


Is scoria a granite rock?

No. Scoria is a basaltic lava ejected as fragments from a volcano, typically with a frothy texture.


Lava that cools so quickly that ions do not have time to arrange into crystals will form igneous rocks with a?

glassy texture


What color is obsididan?

Black, it has a glassy texture.


What does term ''glassy'' mean when talking about igneous rock texture?

Glassy texture in igneous rocks refers to a smooth and reflective appearance resembling glass. This texture is formed when the molten rock cools rapidly, preventing mineral crystals from developing. Glassy texture is typically seen in obsidian, a type of volcanic glass.


What is the texure of obsidian?

Obsidian is an igneous rock with a glassy texture. Its texture is also called hyaline, the Greek word for texture.


What are rocks that have a glassy texture called?

Obsidian


What is the resulting texture of an extremley rapid cooling of lava in which no crystals form?

They are said to have a glassy or vitreous texture.


What minerals are in scoria?

Scoria typically contains minerals such as olivine, plagioclase, pyroxene, and magnetite. Additionally, it may also have glassy material resulting from the rapid cooling of the magma during its formation.