asked 117k views
4 votes
Why does obsidian and igneous rock appear smooth and glassy

1 Answer

4 votes
The answer is because its crystal cools quickly. Obsidian rock usually forms when cooling happens instantly.

Hope this helps!!
answered
User Lysette
by
8.7k points
Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.