Unique stone Pendant 925 silver, vintage

bought several years ago from a vintage street fair in South Africa, Cape Town. very elegant unique two tone stone Pendant, likely a Jasper. I believe this is two pieces of stone that have been seamed together. the darker line inserted over top as the back shows no evidence of that stone. it's a soft mossy blue green grey. with filigree edges. unusual piece and design. very good condition. I've only worn it a couple times. no scratches.