, 2020). Such will increase in the two peak absorption cross portion and width of your 450 nm absorption band much more than linearly increase the toughness of the chromophore with focus. Other chromophores in natural corundum will not present these variations and therefore exhibit a constant toughness with concentration. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share