Shane McClure and Christopher M. Breeding, GIA Laboratory, Carlsbad
Shane McClure and Christopher M. Breeding, GIA Laboratory, Carlsbad
Examines the geographic origin of feldspar based on chemistry and refutes allegations that Mexican material is being sent to China for treatment and sold as Chinese material. Samples from Mexico, Mongolia and the United States are analyzed.
Shane McClure and Christopher M. Breeding, GIA Laboratory, Carlsbad
Shane McClure and Christopher M. Breeding, GIA Laboratory, Carlsbad
Examines the geographic origin of feldspar based on chemistry and refutes allegations that Mexican material is being sent to China for treatment and sold as Chinese material. Samples from Mexico, Mongolia and the United States are analyzed.
