All of our jewelry is guaranteed authentic by our Graduate Gemologist of the Gemological Institute of America (GIA). Victorian 10k rose gold ring featuring a darker blue rectangular turquoise flat slab weighing 1.52 carats and measuring about 10mm x 5.5mm. The color is more like the photo on the hand. The ring fits a size 10.25 finger, weighs 1.86 dwt., and dates from the 1890s. Restored with four new bar prongs. Terrific!