Pictures/Products Care &amp; Where Books Birthstones Anniversary Lore Jokes All Gemstone Information Main Birthstone Page Obsidian Care &amp; Where Obsidian is natural glass formed by volcanic lava that cooled too quickly.
(Obsidian; is; Where Books Birthstones Anniversary Lore Jokes All Gemstone Information Main Birthstone Page Obsidian Care &amp; Where Obsidian is natural glass formed by volcanic lava) (volcanic lava; cooled too quickly; )
Obsidian volcanic lava
is cooled too quickly
Where Books Birthstones Anniversary Lore Jokes All Gemstone Information Main Birthstone Page Obsidian Care &amp Where Obsidian is natural glass formed by volcanic lava