All sciences are based on some of their basic principles, & each one of them has its own definitions & terminologies. Which have meaning winder than what they seem to be Druti is one such process in the science of RAJA SHASTRA which forms both the basic principles & definition of science. Druti (Liquification) is one such important pharmaceutical process of Rasashastra where in the metals / minerals gems are transformed in to a permanent & stable liquid form. Generally it is seen that when metals & minerals are heated up to certain temperature they melt heating is stopped, temperature drops down, and the material solidifies. The liquid state of the material is temporary. Hence, Druti does not mean melting, but maintaining the molten state permanently, with the desired characteristic features. Details of the process and other things have been mentioned in Rasaratna Sammucchaya (R.R.S.), Rasendra Chudamani (Ra.Chu.), Rasa Prakash Sudhakara (Ra.Pr.Su.), Ayurveda Prakash (Ayu.Pr.), Rasa Hridaya Tantra (Ra.Hr.T.), Rasarnava and other classical texts of Rasashatra.