Gemondos art deco collection brings you wonderfully embellished great gatsby esque jewellery designs inspired by the roaring 1920s this art deco style statement ring crafted from 925 sterling silver features a large triangular shaped black onyx cabochon framed with sparkling marcasite gemstonesblack onyx informationnumber of stones 1stone shape triangularstone size 8mm x 8mmcarat weight 150ctnaturalcreated natural black onyxcountry of origin brazilmarcasite informationnumber of sto