Solid 925 Sterling Silver, Blue Sapphire Ring, Gemstone Signet Ring, Mens Ring Material- 925 Sterling Silver Metal Finish - Sterling Silver Stone Size - 18x13 mm Metal Purity - 92.5% Gemstone - Blue Sapphire Quartz Shape - Oval Cut - Faceted Wearing the Blue Sapphire provides protection against theft, terror, accidents, and problems caused due to natural calamities like storms, fire etc. Therefore blue sapphire acts like a shield protecting the person from all dangers