PD on a hoop normally signifies palladium. Your ring may be palladium-plated if it's PD penned above it. HK is usually a trademark that stands for Harriet Kelsall. They structure and supply jewelry everywhere in the UK and also to other sites too.  By simply considering or dealing with jewelry, https://caidenaejlp.link4blogs.com/58008139/jp88-an-overview