This review of yellow sapphires was inspired by The shortage of clarity during the literature as for the origin of the yellow coloration. In retrospect, this uncertainty was the results of 3 components. Initial, the Fe3+ focus in natural stones spans A selection of about four–4750 ppma, but only concentrations https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share