Red Tourmaline or Rubellite 4.15ct,GIA Certified, Report Number = 2205269413,October Birthstone,8th Wedding Anniversary Gift,Natural and Untreated,Dimensions = 13.23 * 9.66 * 6.04mmPear Shape,Excellent Cut,Clarity = VS,Doubly Refractive,RI = 1.62 - 1.64,Tourmaline is sourced from Nigeria.