The Meteorite Classic Flat with Emerald Cut uses a rectangular stone set sideways for a bold look. The ring width needs to be at least as wide as the stone is long.  The inlay is genuine Gibeon Meteorite that is over 4 billion years old and fell from outer space and landed in Namibia, Africa sometime in prehistory.  It has a unique crystalline structure due to it cooling over millions of years in space.  Metals native to Earth don't have this unique structure.  A bold looking contemporary ring.  The ring shown is 9mm wide and has a 5 x 7mm stone.