Yellow Sapphire from Ceylon are considered as greatest astrological Pukhraj and they are normally devoid of almost any treatment method and heating. By subtracting various quantities of the h•-Fe3+ absorption spectrum from the spectrum in the second measurement space, we can easily identify that its concentration is roughly six ppma, https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share