This product is a 2.5mm princess-cut natural blue sapphire loose gemstone, sourced from Sri Lanka. The gemstone is unheated and has good cut quality, making it suitable for jewelry making. It comes with a certification upon request and is classified as eye clean in terms of clarity grade. The gemstone has a beautiful blue color as depicted in the pictures, and its country of origin is Thailand. Ideal for those looking for a high-quality, natural blue sapphire for their jewelry projects.