, 2020). This kind of raises in the two peak absorption cross area and width from the 450 nm absorption band over linearly improve the energy in the chromophore with focus. Other chromophores in natural corundum do not clearly show these variations and so show a constant strength with concentration. https://get-social-now.com/story3365823/the-single-best-strategy-to-use-for-natural-yellow-sapphire-from-sri-lanka