Obsidian .
is formed from sand and quartz
cools very quickly
has large mineral crystals...
![subject](/tpl/images/cats/himiya.png)
Chemistry, 14.04.2021 21:40 dogsarecute278
Obsidian .
is formed from sand and quartz
cools very quickly
has large mineral crystals
cools very slowly
![ansver](/tpl/images/cats/User.png)
Answers: 2
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