Rasaratnākara (Rasāyanakhaṇḍa)

The Tenth Method of Killing Mercury

One should rub purified mercury with an equal amount of sulfur for three days using the juices of kīṭaruci a plant, perhaps a type of insect-repelling herb or the juices of amodā wild celery. Or [use] the juices of ahimārī a medicinal herb or the juices of śvetāṅkula a medicinal herb. (50) Having placed it in an earthen crucible and sealed it, one should cook it for a day and a night in a dung fire. (51) Or [cook it] in a husk fire, and it will surely be killed in three days.

The Eleventh Method of Killing Mercury

Take purified mercury and killed vaṅga tin in equal parts. (52) [Rub] in the middle [of a mortar] for three days with the juices of haṃsapādā Adiantum lunulatum/walking maidenhair fern, then remove it. Smear it with the seeds of divine herbs and a diamond-like coating likely referring to a hardening process using mineral pastes. (53) Having placed the aforementioned mercury therein, cook it for three days in a husk fire. After removing it, [take] an equal amount of purified mercury. (54) Having combined them, [rub] for two days with the juices of haṃsapādā. That ball, when cooked as before, becomes excellent killed processed/stabilized [mercury]. (55)

Instruction by Analogy for Killing Diamond and Others

The method of killing diamond, mica, and the eight metals as stated in the Rasakhaṇḍa Section on Mercury or the Khakhaṇḍa a section of the text should be understood as the same in [the context of] alchemy. (56)

Qualities of Mercury

Mercury killed in this way becomes the supreme nectar. Those who consume it always receive divine favor. It suddenly makes the body capable of the play of celestial maidens and keeps it eternally and supremely beautiful. (57)

Thus ends the first instruction named "Killing of Mercury" in the Rasaratnākara Ocean of Essence-Jewels, written by Nityānātha Siddha, son of Pārvatī.