Science Saturday: Obsidian and its Varieties!!! Obsidian is a volcanic glass that is transformed into rock in a process called devitrification. Different inclusions trapped within the lava as it cools can create variations such as rainbow, spiderweb, silver & gold sheen, and mahogany obsidian!!! Isn’t that cool?! Which is your favorite variety? Let us know in the comments below!!! #sciencesaturday #rainbowobsidian #snowflakeobsidian #sheenobsidian #mahoganyobsidian Sources- https://volcano.orego