Derbyshire Blue John & Whitby Jet 

 Two stone hexagonal pendant with Blue John & Mother of Pearl 

Lovely Blue John stone purple flashes and a more purple lighter coloured  background on this hex pendant, the MOP  side is stunning and has lots of iridescent showing. 
Assay stamped to bail 

Pendant height. 49mm. without bail 26mm. Width 27.5mm. Depth 5mm

Really nice quality 18" 6gram belcher  curb chain

Comes with a leatherette gift box