PD on a hoop usually represents palladium. Your ring could be palladium-plated if it's PD penned more than it. HK can be a trademark that means Harriet Kelsall. They structure and provide jewellery everywhere in the UK and to other areas at the same time.  Can “JP” also stand for https://spencerrqlmx.oblogation.com/36067031/jp88-fundamentals-explained