, 2020). These improves in both of those peak absorption cross portion and width from the 450 nm absorption band greater than linearly boost the strength of the chromophore with focus. Other chromophores in natural corundum will not show these improvements and therefore show a constant strength with focus. Beware https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share