This study of yellow sapphires was determined by The dearth of clarity during the literature as to your origin of your yellow coloration. In retrospect, this uncertainty was the results of 3 components. Initial, the Fe3+ concentration in natural stones spans A selection of approximately 4–4750 ppma, but only concentrations https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share