Zoe Kravitz and Harry Styles are once again at the center of relationship buzz after the actress was spotted wearing a noticeable piece of jewelry during a romantic outing in Rome. Photos obtained by The Sun show Kravitz with a chunky gold band on her ring finger as she walked arm-in-arm with Styles, fueling engagement rumors around the celebrity couple. The gold accessory appeared to be the same multi-layered ring paired with a singular band that Kravitz, 37, was seen wearing last month. While neither Kravitz nor Styles, 31, has confirmed anything, the placement of the ring has prompted speculation that their relationship may have reached a new milestone. Zoe Kravitz and Harry Styles fuel engagement talk in Rome Despite the rumors, the couple appeared relaxed and affectionate as they explored the Italian capital together. Zoe Kravitz and Harry Styles have been making headlines since confirming their romance in August, after being photographed on several loved-up walks across Europe. Since then, their whirlwind relationship has taken them to Rome, Tuscany, London, and New York City. …