I purchased this from a specialty store and loved it very much, but recently my fingers have gotten thicker, and it's become too tight, so I'm reluctantly putting it up for sale. The color is like a glacial lake, so mysterious, and it changes depending on the time and place. It's no wonder so many people are captivated by the alluring color of the Paraiba stone. Also, because this ring is oval-shaped and has a large surface area, it appears larger than its actual carat weight. (See image 3) If you are interested in purchasing, please consider it. K18 (750 stamp). Natural Paraiba Tourmaline: 0.15ct (stamp). Natural Diamond: 0.02ct (stamp). Size 10