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Nov 22, 2021

[Answer] Which glass-like rock is made from rapidly cooling volcanic lava?

Step 1 : Introduction to the question "Which glass-like rock is made from rapidly cooling volcanic lava?"



...1. Marble 2. Obsidian 3. Flint 4. Granite




Step 2 : Answer to the question "Which glass-like rock is made from rapidly cooling volcanic lava?"



Obsidian - Obsidian is an igneous rock which means it derives from magma or lava. The rock forms when molten lava cools so rapidly that the atoms cannot form a crystalline structure. This results in a glass-like rock that has been treasured for centuries for its beauty. Most obsidian is black but occasionally the inclusion of iron oxides creates a red or brown hue. Due to its smooth character obsidian was used by ancient civilizations, such as the Aztecs and the Greeks, to make mirrors.:


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