Labadorite Pendant with silver necklace

Please inspect photos carefully as they are the best description of this beautiful Labadorite and sterling pendant. Will come with necklace…please indicate which you’d like…ie. Box chain or something more ornate? Length? I have a good variety to choose from. Last pic shows a mark that is indecipherable to me…also note fine, shallow scratches commiserate with age which by reckoning 40+ years.