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Title
Gem News International.
Abstract
This section offers news briefs related to gems as of September 2011. An analysis made on two green-brown diamonds from the Simi mines in Sierra Leone found that they exhibit different colors when exposed to incandescent light and illumination from a fluorescent microscope. The afghanites from Dudley Blauwett Gems in Louisville, Colorado have colors similar to aquamarine. The conditions of emerald mines in Afghanistan have improved since 2006.