Obsidian is smooth and shiny so the figures are attractive to look at. Chalk, limestone, shale, and sandstone are all examples of sedimentary rocks. All these different sedimentary rocks are ...

Since it's born out of molten rock, obsidian is only found in volcanic regions of the world, including in parts of the United States, such as the Mountain West, Southwest, California, Oregon, and ...

As with other forms of obsidian, rainbow obsidian is both rock and glass. However, this isn’t the same kind of glass that’s used in your nice new French doors. It’s far more badass ...