This review of yellow sapphires was motivated by The shortage of clarity during the literature as on the origin of the yellow coloration. In retrospect, this uncertainty was the result of a few components. Initial, the Fe3+ focus in natural stones spans A variety of somewhere around four–4750 ppma, but https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share