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What is a extrusive rock that is actually glass?
Obsidian is an extrusive rock that is a naturally occurring volcanic glass. It occurs when lava extrudes from a quickly cooling volcano, causing little crystal growth.
What kind of igneous rock is obsidian?
Obsidian is an igneous rock. However it differs from other rocks because it contains no minerals. It consists of natural glass, which is not a mineral because it has no crystal structure.Answers from McDougal Littell, Earth Science book
A glassy fine grained extrusive rock?
This description likely fits obsidian, a natural glass formed from rapidly cooling lava. Obsidian is characterized by its fine-grained texture and shiny, smooth surface. It is commonly black, but can also be found in other colors like brown, red, or green.
How do you get glass to be shiny?
get lots of sponges,towels,soap,and water.rubit on glass.and there you have it. you have shiny glass.
If lava cools to quickly that ions don't have time to arrange themselves into crystals will form what?
glassy texture, hope this helps :)
What is the shiny stuff in a rock called?
Most extrusive igneous rocks are usually shiny and smooth. This is because, they cool, solidify, and crystalize rapidly on the earth's surface, where there is less obstruction, and no enclosures.
Which reflects heat shiny black or dull black?
Shiny black
What is a black glass like rock?
A black glass-like rock could be obsidian, which is a natural volcanic glass formed from rapidly cooled lava. Obsidian is usually black in color and has a shiny, glassy appearance due to its lack of crystalline structure. It is commonly used in jewelry and decorative objects.
What collor is obsidian rock?
shiny black. if it is cut thin enough, it looks like gray glass because you can see through it.
How do you get your black hair shiny like most asians?
well Indians are kind of the same you get rocks and rub them against your hair for 5 minutes it can be any rock i prefure white rocks
What is a rock that looks like smooth glass?
A rock that looks like smooth glass is often obsidian, a volcanic glass formed when lava cools rapidly. It has a shiny, glassy appearance and can be black, brown, or even green. Other rocks that may resemble glass include some types of jasper or agate, but obsidian is the most commonly associated with a glass-like texture. Its smooth surface can be sharp and is often used for tools and decorative items.
What rocks are shiny and smooth?
mica
