asked 192k views
4 votes
What black glassy mineral might you get if molten lava cooled so rapidly that crystals did not have time to form

2 Answers

4 votes
I think it is physician because I read it in a book
answered
User SJHowe
by
7.9k points
0 votes
It might be obsidian.
answered
User Simon Peyou
by
7.7k points
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