Archaeologists in Jerusalem say they have discovered a roughly 2,300-year-old gold ring with a red gemstone that’s remarkably similar to another piece of jewelry found less than a ...

† Instituto de Tecnología Química, Universidad Politécnica de Valencia − Consejo Superior de Investigaciones Científicas, Av .de los Naranjos, s/n, 46022 Valencia, Spain ‡ Departamento de Ciencia de ...