JP on a hoop is a hallmark and this stamp is employed by a well known jewelry enterprise named Jack Pilatowicz. Jack founded his firm in 2007 in Brisbane, Australia, after 20 years of experience in the jewelry production field. HK is usually a trademark that stands for Harriet Kelsall. https://garrettbtulj.collectblogs.com/81482270/the-fact-about-jp88-that-no-one-is-suggesting