Obsidian is perhaps best known in its role as the dark black blade atop ancient spears ... rainbow obsidian is both rock and glass. However, this isn’t the same kind of glass that’s used ...

It’s a surreal scene: fiery lava oozing from between black rocks meeting the pristine white ... you can hear the sound of breaking glass and feel the heat of the lava.” For guide Saro Trovato ...

It’s a surreal scene: fiery lava oozing from between black rocks meeting the pristine white snow blanketing the mountain. This mesmerising sight is drawing thousands of thrill-seeking tourists from ...