Crystal forms
(update 6/5/17)
As the lava cools and decompresses on its trip up through the crust some crystals may form.
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Quartz crystals inside a bomb?
??
(update 6/5/17)
As the lava cools and decompresses on its trip up through the crust some crystals may form.
??
Quartz crystals inside a bomb?
??