A purer "cornflower", no heat, Ceylon blue from the gem fields of Kuruvita, Sri Lanka. Even during our last trip to the island nation of Sri Lanka, despite all-time-high prices for locally mined or imported gemstones, we obtained sapphires that were completely natural and untreated at a meager price for the quality they offered. Please, shop with confidence here. Certified unheated by the SGL (SanGems  Laboratory, Sri Lanka)