Books By Joaquim Sanz, Oriol Tomasa, Abigail Jimenez-Franco, Nor Sidki-Rius - Author

Joaquim Sanz

Degree in Mining Engineering (Polytechnic University of Catalonia) (UPC), Gemmologist and Diamond Specialist (University of Barcelona) (UB) & (Gemmological Association of Great Britain).

Professor of Mineralogy (Polytechnic University of Catalonia) (UPC) and Director of the Valentì Masachs Geological Museum (UPC), now retired

Oriol Tomasa Guix

Mining Engineering and Master's degree in Natural Resources Engineering from the Polytechnic University of Catalonia (UPC), lecturer in part-time of Mineralogy (Polytechnic University of Catalonia) (UPC), and he is doing his PhD in Natural Resources and Environmental Engineering.

Abigail Jiménez Franco

Geologist (National Autonomous University of Mexico (UNAM), PhD by the Polytechnic University of Catalonia (UPC) and Gemmologist (University of Barcelona) (UB),