Is definitely the species, neutral or ionized, indicated by its usual chemical image. Vacancies are denoted by V Certification: The existence of a credible gemological certification from a highly regarded and recognized gem laboratory provides believability and assurance to the caliber of yellow sapphire or any other gemstone. Yellow sapphires https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share