QugoNox 2Vi is a purification chemical used for the purification of impurity diamond. It can evaporate if opened without the proper machines and it is not good for the eyes when evaporated.

In the first stage of the diamond recovery, the catalyst and carbide phase are dissolved in acids or their mixtures. In the second stage, the non-diamond carbon phases are selectively oxidized with various reagents. In the third stage, the compounds insoluble in water and acid solutions are removed if their content if greater than 10%. Then, the purified diamond crystals are washed with water and dried.