I have purchased many pieces of jewerly in Phillipsburg on our trips including an engagment ring, the wedding ring , diamond tennis bracket , etc. We aleays buy from Micky at Grand Jewelers. Each piece I have brought back to a jeweler in the US. Each time it was appraised for thousands more than I,paid. The key they all said is the entire town is basically owned by south African diamond mines. They can sell gems at much lower prices because they sell such a large amount of pieces. I was told US jewelers can not compete. Just make sure you don't pay what the sticker says. For instance, I bought a,diamond tennis bracket for $2600. It was originally marked at $11,500. My jeweler in the US estimated its true value about $6000.