materials






 

Question by  tanayafarr (290)

What is obsidian rock made of?

How is it formed?

 
+7

Answer by  Lucy101 (225)

Obsidian rock is a natural volcanic glass produced during the rapid cooling of volcanic lava. It consists mainly of silicon dioxide.

 
+5

Answer by  sailoryue (853)

obsidian is a volcanic glass. it occurs when lava cools really fast without forming crystals. it can also be very dangerous to handle as the sharp edges have molecular thinness

 
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