(IDEX Online) - British actress Lily James is again promoting the beauty of natural diamonds in a new global ad campaign.She features in the second instalment of To Treasure Now and Forever, by the New York-based Natural Diamond Council, at a time when gap between natural and lab grown prices is widening almost daily.The 34-year-old Emmy-nominated star, known for roles in Pam and Tommy and Downton Abbey, was appointed by as its global ambassador last year and starred in the first instalment.A new set of images, featuring designs by Anita Ko and Norman Silverman among others, will be available for retailers to use as traditional and digital advertising assets throughout 2024. "It has been illuminating to discover the positive impact of the natural diamond industry across the globe and its commitment to continued improvement," said Lily. "I am eager to witness more of this firsthand in my new role."Pic courtesy Natural Diamond Council