16.38ct GIA Certified Paraiba Tourmaline, 1.90ctw VS1-VS2/G-J Diamond Solid 18K White Gold Ring (Comes W/$105,000 Appraisal) - This stunning ring was finely crafted of solid 18k white gold and boasts a massive 16.38ct GIA certified oval cut Paraiba type tourmaline which displays a lively, vivid transparent icy greenish blue color that is truly stunning. Paraiba tourmaline is one of the rarest stones in the world, and gems of this size and quality are becoming increasingly hard to find in today's market. These gorgeous gemstones are only found in copper rich areas such as Brazil, Nigeria and Mozambique, and mining these stones is difficult and mostly done by hand. Copper Bearing "Paraiba Type" tourmaline displays a stunning, vivid blue green color due to the presence of copper, making this particular color of tourmaline one of the most sought after by gem collectors, as they appear to have a stunning neon-like glow even in low lighting conditions. The ring is also decorated with approximately 1.90ctw genuine VS1-VS2/G-J diamonds, with approximately 0.90ctw VS1-VS2/H-J marquise cut diamonds flanking the tourmaline and 1.00ctw VS1-VS2/G-H diamonds lining the perimeter of the piece. The ring measures 20.5mm x 19.5mm and the band measures 2.5mm wide. It will come with the GIA report for the tourmaline along with a $105,000 insurance valuation report in the winning bidder's name by a graduate appraiser. Ring size: 7. (WEIGHT: 11.2 grams)