0 1 soaking water
Soak the saffron in water, and then observe the color of the water. If the color of the water becomes turbid, it means it is fake saffron.
Put the saffron on the white paper, and then press it by hand. If there are traces on the paper, it means it is fake saffron, or the saffron is mixed with vegetable oil.
Smell the smell
Pick up the saffron and smell it. If there is a strong fragrance, it is real saffron. If the smell is weak, it is fake saffron.
Morphology of crocus sativus
Observe the shape of saffron carefully. If the saffron is lumpy, it may be mixed with water. Normal saffron will not be lumpy, and the real saffron is easy to break.
Special note that the picture comes from the network.