We purchased a large 20lb piece of Ocean Jasper from a source in Madagascar.   This was "slabbed" like a loaf of bread into 1/4" thick slices.  We chose one of those slices and cut this 43x25mm oval Cabochon and encased it in a Sterling Silver Banded Pendant.  The patterns in this semi-translucent stone are amazing.
 
For this Pendant, we recommend a 24” Medium Rope Sterling Silver Chain, #1125.
 
Please be aware that the items in our photos are often much larger than actual. This is done intentionally to give you a closeup view.