An art deco style necklace featuring black onyx gemstones decorated with sparkling marcasitesmarcasite informationnumber of stones 11stone shape roundstone size 1 x 160mm 2 x 140mm 4 x 120mm 4 x 110mmcarat weight 016ctnaturalcreated natural marcasitecountry of origin austriablack onyx informationnumber of stones 4stone shape diamond triangle squarestone size 1 x 12mm x 4mm 2 x 5mm x 3mm 1 x 25mm x 25mmcarat weight 065ctnaturalcreated natural b