, 2020). Such raises in both of those peak absorption cross portion and width of your 450 nm absorption band greater than linearly enhance the strength on the chromophore with focus. Other chromophores in natural corundum will not clearly show these changes and thus exhibit a continuing toughness with focus. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share