Marco Bicego Siviglia 18ct Yellow Gold 0.21ct Diamond Ring. AB490 B. For luxury easy to wear jewellery, the Marco Bicego collections are the perfect place to start. The fascinating combination of Italian craftsmanship and creativity produces the signature designs that Marco Bicego is famous for. Bicego's designs are based upon three signature hallmarks including multi coloured gem stones, hand twisted coil and hand engraved 18ct gold, all which are showcased in his world renowned collections. The Marco Bicego Siviglia collection is inspired by the beautiful and exotic cobblestone streets of Seville in Spain. The collection features pieces with hand engraved gold and pebble shaped accents that vary in size for an elegant and sophisticated look. The Marco Bicego Siviglia 18ct Yellow Gold Diamond Ring is an elegant piece that features 18ct yellow gold engraved with the distinctive bulino finish and embellished with 0.21ct brilliant cut diamonds. There are also matching items within the collection that can be found on our website.