The Duchess of Edinburgh has quietly become a major royal icon as Princess Kate takes a step back amid her cancer diagnosis. For example, Sophie, Duchess of Edinburgh wore a stunning 10-year-old Prada coat to join the King and Queen at the Easter matins service in Windsor last Sunday. The 1960s-inspired design won Sophie, 59, plenty of style points. According to The Telegraph, that shade of purple is making a comeback, as seen on the catwalks at Valentino, Ralph Lauren and Giambattista Valli. Sophie has enjoyed a fashion transformation over the past decade, according to reports. The mother-of-…
