, 2020). These boosts in both of those peak absorption cross portion and width of the 450 nm absorption band much more than linearly boost the strength of the chromophore with focus. Other chromophores in natural corundum do not exhibit these changes and thus show a relentless toughness with concentration. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share