The 18kt Yellow Gold Vermeil Urban Bar Necklace With Red Onyx by Jewel Tree London. The Urban Bar Necklace is a clean geometric jewellery design that is edgy-elegant with a strong individual style statement. This contemporary necklace design features a Red Onyx baguette that has been hand-cut to our design specifications and set in 18kt Yellow Gold plated Sterling Silver. Please note that there may be a slight colour variation in the stones from piece to piece due to its natural origin. About The Designer: Jewel Tree London’s designer and creative director Deborah Zama creates timeless and elegant jewellery inspired by architectural designs, materials, and forms, featuring a range of semi-precious stones and refined metals. Deborah has innovated the design process by combining traditional practices with modern technology – each of her pieces is individually crafted by hand. To view more of this designer\'s collection please visit Jewel Tree London.