, 2020). These kinds of boosts in each peak absorption cross segment and width from the 450 nm absorption band much more than linearly raise the strength of the chromophore with focus. Other chromophores in natural corundum do not demonstrate these variations and so show a constant strength with focus. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share