Featured in this lot is this AAA tanzanite 7.75 carats and VS2 diamond platinum ring with GIA and AIGL paperwork. The ring shows a polished, stamped, and tested platinum ring with a bright finish and a lovely under gallery. The ring shows a large oval cut tanzanite stone with a brilliant cut crown and modified brilliant cut pavilion and weighing 7.75 carats; it shows very good cut grade and violetish blue coloration. The center stone is profusely decorated with 36 natural brilliant round cut diamonds that have a collective weight of 0.55 carats, a VS2-SI1 clarity grade, and a color scale of G-H. Tanzanite is a very rare, precious gemstone that is only found in the Usumburu Mountains that border the Umba Valley of northern Tanzania. It was originally discovered in 1967 by Tiffany & Company, who named the stone Tanzanite. This example is unique due to its exceptional pleochroism (an optical phenomenon in which a stone has different colors when observed at different angles). The piece comes complete with AIGL Inc. (American International Gemological Laboratories, Inc. a GIA certified lab AIGL#: K69E98-EA14777) report and appraisal confirming the above info and giving a total value of $17,493.00. The ring size is US 7.