Featured in this lot is this 3.01 carats trillion tanzanite, diamond and 18k white gold ring with IAS paperwork. The ring shows an 18k stamped white gold ladies custom ring with an 'Orianne' hallmark and 18k gold stamp on the inside of the ring band. The ring’s center stone is a prong set natural trillion tanzanite stone with a collective weight of 3.01 carats, fine blue/ purplish coloration, and a fine cut and clarity. 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 trillion shape center stone is decorated by 33 total natural round brilliant cut diamonds with a weight of 0.38 carats, a coloration gradient G – H, and VS clarity. The piece comes complete with IAS (Independent Appraisals Services, a GIA certified lab IAS Appraisal Number#: 33921EW) report and appraisal, confirming the above info and giving a total value of $10,895.00. The ring size is US 7.