This examine of yellow sapphires was determined by The shortage of clarity in the literature as on the origin on the yellow coloration. On reflection, this uncertainty was the results of a few variables. First, the Fe3+ focus in natural stones spans A selection of approximately 4–4750 ppma, but only https://getsocialsource.com/story3390979/little-known-facts-about-sri-lankan-yellow-sapphire