Douglas Martin Vincent Manson (1936 – July 3, 1999) was a South African geologist and gemologist who is known for the exhibits he created while curator for the American Museum of Natural History and for his scientific contributions to the field of gemology.
He was employed at De Beers' Diamond Research Laboratory for two years, before moving to Nova Scotia where he worked in geochemical prospecting.
[2] Manson was brought on as Assistant Curator of Mineralogy at the American Museum of Natural History following the departure of Brian Mason in 1965.
[4] He became the associate editor of Gems & Gemology, a journal in which he frequently published articles on the classification of garnets.
[1] Manson worked to establish the International Gemological Symposium, a yearly event which he chaired three times.