It's important to authenticate and validate the specs from the gemstone you are looking to buy. In the situation of Ceylon Yellow Sapphires, watch out about picking irradiated gemstones only. Certification: The existence of a reputable gemological certification from a reliable and identified gem laboratory provides trustworthiness and assurance to https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share