If you are looking for the highest quality of Yellow Sapphire gemstones, then only some of the recognized companies are Navratan. Navratan located in Jaipur is a certified company that sells natural genuine gemstones such as Yellow Sapphires of superior quality. While purchasing, they should look for such characteristics as bright yellow color, clarity, correct cut and carat. Reliability and authenticity are important in choosing gemstones especially when used for astrological purposes, unheated sapphires are the best. Yellow Sapphires of the highest quality are most readily available from Sri Lanka (Ceylon). If you are to buy gemstones it is important to buy from a reputable dealer like navratan so that you can be as certain as possible that the gems you are getting are real and are accompanied with relevant certification. They should ensure that they look at the 4C’s and the origin before they make their decision of buying quality Yellow Sapphire gemstones.