A stunning art nouveau design necklace featuring a beautiful blue topaz and decorated with sparkling marcasite gemstonesblue topaz informationnumber of stones 1stone shape roundstone size 5mmcarat weight 055ctnaturalcreated natural blue topazcountry of origin brazilmarcasite informationnumber of stones 7stone shape roundstone size 4 x 190mm 3 x 130mmcarat weight 021ctnaturalcreated natural marcasitecountry of origin austria