Dr. Miro Fei-Yeung Ng is a gemmologist with a chemistry background (PhD from the University of Hong Kong). With 13 years of frontline lab certification and teaching experience, Dr. Ng started CGR in 2019 with the focus on practical gemmology and tailored courses to private clients. He is also an active contributor and participant in various associations and conferences. At the same time, Dr. Ng is the only Chinese professor at L’ÉCOLE School of Jewelry Arts supported by Van Cleef & Arpels.

A gemmologist with over 25 years working experience in several gemmological laboratories, Dr. Lore Kiefert studied Mineralogy in Heidelberg, Germany in 1981 and completed her Master’s thesis on the origin of sapphires in 1987. Not long after, she moved to Australia where she pursued a different field of research: Mineralogical and Chemical Composition of Desert Dust. This work earned her a PhD in 1996.

In 1994, Dr. Kiefert joined the SSEF Swiss Gemmological Institute as Deputy Director and later became Director of the Coloured Stones Department. During her time at the SSEF, in 1998, she completed her FGA Diploma. In 2005, she moved to New York to head the AGTA Gemmological Testing Center as Laboratory Director. Later, in October 2009, Dr. Kiefert returned to Switzerland to join the Gübelin Gem Lab as Chief Gemmologist.

In June 2017, Dr. Kiefert was rewarded a temporary Professorship at Tongji University in Shanghai where she was also awarded the Visiting Professor status.