Our blue sapphire ring is made in 925 sterling silver with an 8x6mm lab grown sapphire gemstone in a faceted oval cut. Perfect for a promise ring this Valentine's Day. The stone has a royal blue sparking color adorned with natural white topaz accents on each side. The setting is 925 sterling silver with an open back in the center. We have 2 available in a size 8. About Sapphire: Sapphire comes from the Persian word "safir" which is derived from the Greek word meaning blue. Sapphire belongs to the corundum group of minerals, and although blue is the most popular color, sapphire can come in a variety of colors. Sapphire can be any gem quality corundum stone color except for red, which is ruby. It is the second hardest gemstone next to diamond. Lab Grown Gemstones: A lab grown gemstone is a man-made material with the same chemical composition, crystal structure and optical and physical properties as the natural gemstone. Materials: Blue sapphire lab grown gemstone 8x6mm oval cut Natural white topaz gemstones 2mm round 925 sterling silver setting If you have any questions just click "message seller" on our homepage. Thank you for visiting our jewelry shop, Linda and Joe .