Betania trip notes mention people picking up "escarchas rojas" (red frost)
May 2003 From a travelogue titled Our day trip to [Betania]. - While we there, there was a bunch of people picking up "escarchas rojas" (red frost), which are sometimes found surrounding miraculous images of the Virgin, or the places where they have appeared. The "escarchas rojas" are supposed to be produced by the Virgin itself, so they are believed to be a supernatural phenomenon. It's been reported that some images of the Mystic Rose Virgin produce them, too.