Saffron has an aroma and flavor that cannot be duplicated in fake saffron. The only thing that fake saffron makers can copy is the physical likeliness of saffron, so they can fool customers into buying it. They generally add the color real saffron gives out and package it in 1 gram plastic containers.
1- If you put a thread of real saffron in your mouth and it feels sweet, then it’s fake!
2- Saffron threads when placed in cold water for a few minutes will color the water and come out still looking like the original saffron thread. If the color washes out and the thread when taken out has faded or completely lost its colour, then it’s fake.
3- If you wet your finger, place a saffron thread on it and pull it on a white blank paper the colour should be in yellowish spectrum. If it colour is red, then it’s fake.