Genuine earth mined sapphire .Silver with anti tarnish coating that gives the ring the look of white gold. Sapphire approx. 2.37 cwt. and approx. 9x7 mm. The red colour is caused by chromium. Please read the IMPORTANT TERMS AND INFORMATION page at least once as it applies to all listings. ANY questions, please ask., please ask. Please remember that you are looking at gem at extreme magnification