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Title
Lab Notes.
Abstract
This section offers news briefs related to gemology as of September 2011. The properties of a faceted clinohumite that weighs 84.23 carats is documented at the Gemological Institute of America. A diamond that is round-cut is examined to determine how plastic deformation made its color black. The results of tests on two yellow-brown pearls that are cultured in a saltwater mollusk found at the Sea of Cortez in Mexico are presented.