A beautifully designed art deco style necklace with black onyx and marcasite gemstonesthis necklace comes with a 3cm extender full length 45cm 18inblack onyx informationnumber of stones 1stone shape trianglestone size 16mm x 15mmcarat weight 500ctnaturalcreated natural black onyxcountry of origin brazilmarcasite informationnumber of stones 15stone shape roundstone size 1 x 140mm 14 x 120mmcarat weight 020ctnaturalcreated natural marcasitecountry of origin austria