H.Stern jewelry company was founded in 1945, when Hans Stern opened a small jewelry workshop in Rio de Janeiro downtown. Today, after 70 years, H.Stern is the largest jewelry company in Brazil and Latin America as well as one of the most famous brands in the world. The company makes jewelry, as well as mines and processes Brazilian gems. Each gem in use must undergo difficult review in the laboratory, complying with Gemological Institute of America (GIA) standards.