What a sensuous sapphire. This lab certified unheated, Ceylon blue hails form the gem fields of Kuruvita, cut & polished in the town of Ratnapura, Sri Lanka. We have been dealing for many years exclusively with Sri Lankan mining-coops known locally for ethical and fair trade practices. We thank each & everyone involved this process. Certified unheated by the Tokyo Gem Laboratory (Thailand)  &  GIL (Gemological International Laboratories).