A large bubble trapped inside a small cavity from the Gobosobeb Mountains in Namibia! If you look just behind the bubble there is another bubble that moves just slightly! $35!

This is a very nice opal on matrix from a rare locality! From Spencer Idaho; this area produces some really amazing opal! I got this piece a little wet to show off the colors and the flash a little better. But amazing coverage of color all over the piece! $90!