This rectangular Australian opal ring has flashes of bright green amid rivers of chocolate.  Accents of 14 kt gold adorn the bezel as well as the band.  The comfortable split band is tapered and easy to get on and off if pizza was on the menu earlier in the day!  The ring is oxidized to make the gold show a little more.  Only one.
 
Australian Boulder Opal, 14 kt gold, Sterling Silver
Size 5+   Inside diameter ...5/8" x a little under 5/8"  -D shaped ring
Band is 5mm tapering to 3mm (larger than 1/8 to start tapering to 1/8)