Allochromatic gems are gems which have been colored by impurities. Should they had been fully pure, they would be colorless. The colour of all allochromatic gems is produced by defects. As a result, all shade in corundum is a result of defects. Pukhraj stones are believed to get impressive talismans https://atozbookmarkc.com/story18278449/rumored-buzz-on-natural-pukhraj-from-sri-lanka