Marco Bicego Murano 18ct Yellow Gold Cushion Cut Amethyst Ring. AB504 AT01. 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 18 carat gold, all which are showcased in his world renowned collections. The Marco Bicego Murano collection, inspired by the changing colours of the Venetian sea, showcases a spectacular array of coloured geometric gemstones that are highlighted by the hand engraved 18ct yellow gold that they are set in. This Marco Bicego Murano 18ct Yellow Gold Cushion Cut Amethyst Ring is a striking statement piece that features a cushion cut, irregular and faceted Amethyst gemstone set onto an 18ct yellow gold band that has been textured using the distinctive bulino technique. There are also matching items within the collection that can be found on our website.