This kind of saffron is pure and contains the stigma without the style.
The Threads or stigma of the flower is the actual source of saffron. 105-115 kg of saffron flowers produces 1kg of sargol saffron. Persian Sargol saffron in Iran exceeding ISO 3632 Grade 1 standard and has very high quality. In Spain, it is called cope saffron.
The colour potency of Sargol grade is very high and the score in Iranian saffron is between 220-270usp.