.50 Princess Cut Diamond Cocktail Ring in 18K Yellow Gold.  This unique and modern cocktail ring features a .50 carat princess cut diamond finished in 18 karat yellow gold. Set flush in a structured band, the near colorless diamond has square-shaped, dramatic facets that allow for ample amounts of light play. The diamond is eye clean and finished in polished 18k yellow gold. This stunning right hand ring represents strength and has a forward-thinking, modern style.