Jem Jewelers was founded in 1978 by Joseph Ermigiotti, a master bench jeweler and William Heinz, a diamond broker and jewelry wholesaler. At the time of Bill’s retirement a young energetic Gemological Institute of America (GIA) Graduate Gemologist became Joe’s partner, his name, Steven Petrillo. In 2005, Joe sold his remaining shares to Steve, making him the sole owner. From 2005 to present day, Steve has made Jem Jewelers one of Southeastern Pennsylvania’s most successful prominent jewelry stores. Steve has pledged to keep the integrity of Jem Jewelers offering quality designer styles at affordable prices.