Is the species, neutral or ionized, indicated by its common chemical image. Vacancies are denoted by V Certification: The presence of a credible gemological certification from a reliable and recognized gem laboratory adds believability and assurance to the caliber of yellow sapphire or some other gemstone. The information of figure https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share