Allochromatic gems are gems which have been colored by impurities. When they have been absolutely pure, they would be colorless. The colour of all allochromatic gems is made by defects. Therefore, all color in corundum is caused by defects. Marital Bliss: Donning a natural Pukhraj will enhance marital bliss. Should https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share