Deep Blue Created Sapphire! This stone is what sapphires are all about. Well cut, with lots of blue sparkle, this totally clean stone would run about $4,000 if it were a natural Kachanaburi Royal Blue Sapphire... and yes, the color is THAT good. Our most popular ring design, this ring sits nicely on the finger, creating just a little dome. The pattern work on the side is a nice addition to the Created Blue Sapphire. You're sure to enjoy the ring time and time again. That's because we just started using a new alloy that is tarnish resistant. Another way that Sylvarocks is watching out for our customers. At SylvaRocks, all of our Sterling Silver is made with .925 Sterling Silver. Argentium Sterling Silver is a state of the art alloy which modifies the traditional Sterling Silver alloy (92.5% silver + 7.5% copper) by replacing some of the Copper with a rare metallic element called Germanium. Adding Germanium to the Sterling Silver results in a highly tarnish resistant Silver -- highly coveted by Silver lovers everywhere.