Featured in this lot is trillion cut Tanzanite and blue green natural Opal Diamond 14k gold necklace. Tanzanite Is a very rare precious gemstone that is only found in the Usumburu Mountains that border the Umba Valley of northern Tanzania. 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 cut Tanzanite stone is set into the center of this triangular pendant weighing 2.32 carats and thows wonderful examples or blue/ green natural opal stones showing 6 in total weighing 0.36 with wisps of round cut Diamonds on the pendant and on the eyelet collectively weighing 0.49 and showing 12 stones in total and the gold weight is 5.16. the Crown Jewels hallmark is shown on the back of the eyelet.