This product is a top luster natural blue sapphire gemstone certified by Super Diamond. The gemstone is a 7x5 mm cushion shape with an excellent cut grade, making it a high-quality piece for jewelry or watch making. The sapphire is transparent with eye clean clarity, and has been heated for treatment. Originating from Sri Lanka but manufactured in India, this vintage gemstone comes in a single piece and is sure to add a touch of elegance to any jewelry design.