Rasahṛdayatantra (1728 manuscript)

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...or the sharp vākocā a medicinal herb or of the trasa moving/living substances etc. The mixture of one of these in all cases produces coloration. [7] By their own respective potencies and the strength of the metals mentioned, the color increases; with red lotus and padmarāga ruby, one should place the color and sneha oil/unctuousness in the lotus-like mercury. [8] Now, the method for the penetration of mercury (rasavedha) is described: with all these combined, with pearls, and by the biḍa salt mixture process, the mercury becomes like gold. [9]

Salutation to Prosperity (Śrīḥ)

The method for the killing (māraṇa) calcination to ash of the metals mentioned is described: with tālaka orpiment, darada cinnabar, and śilā realgar, together with sneha, kṣāra alkali, and amla sour substances and salt. One should perform puṭa firing in a closed crucible three times with these. [10] The method for filling the metal is described: with the application of red sneha, one should perform the rest. The jāraṇa digestion/absorption of the mercury makes it look like an indragopa cochineal insect. [11] Even if it is heavy, the profit and the intent are described: or, one makes it pure by itself, or with darada cinnabar, it produces the sulfurous quality, twofold or threefold, appearing like lacquer juice. [12] Another method: purified by water and cows' urine, by one or the other, it colors the "King of Metals" mercury like a red lotus. [13] Regarding the authorities on color, such as sulfur: the external color of sulfur, the raga color of manaḥśilā realgar, and the mākṣika pyrite mixture—these are known for dyeing. [14] The praise of the two primary substances, sākṣara with alkali and parepaya other liquids, is described: gradually, when mixed with vīra-rasa heroic mercury, it becomes gold-colored naturally. [15] The abhraka mica method is described: now, kṣuṣṇāmra finely ground mica, when fired, becomes red. If it digests threefold, it naturally resembles the luster of gold. [16] The method for killing gold: with threefold mākṣika pyrite, gold is mixed with rasanāla a catalyst. When six substances are added, it should be given until it reaches twice its weight. [17] The sign of the digestion of this ash is described: when that powder is threefold, the digested gold is twice-digested, and it naturally becomes gold-like and colors all metals. [18] The learned one describes the method for all metals and mercuries: when digested eightfold, it colors; again, when digested eightfold, it colors—one should cause the thread to digest. [19]

Thus ends the eighth chapter of the Rasahr̥daya, "The Teaching on the Eighth Killing."

Now, the seed (bīja) method will be described. If nirvāpaṇa quenching is done in a young state, if it is soft, it is called the state of tranquility. [1] Thus the definition. [1] The praise of the seed is described: nothing among other metals can create gold without the seed. This is called the two-fold method. [1] The purification of rasa mercury, uparasa secondary mercury, and dhātu metals is described: the purity of rasa is by gagana mica and uparasa and lauha iron powder. [2] The effect of the abhra mica and suvarna gold seed is described: that which is done by the power of the mercury, it becomes the essence. [3] The rasa-saṃskāra alchemical processing of mercury is described: gandhaka sulfur, kanaka gold, kānta lodestone, sasyaka blue vitriol, mākṣika, vimalā a pyrite-like mineral, darada, rasaka zinc ore, añjana collyrium, and others—these are the rasāyanas elixirs. [4] The uparasa secondary minerals are described: gandhaka, gairika red ochre, śilā, tālaka, kṣiti, añjana, kuṣṭha, gaḍa. These are the twenty-one secondary minerals, including metals. [5] The lauha-bhūna types of iron/earth are described: gāndhāra, tīkṣṇa sharp/steel iron, kānta, abhra, sattva essence, lauha, trapu tin, nāga lead. [6] The lavaṇa-kṣāra salt-alkali names are described: sauvarcala black salt, saindhava rock salt, cūlikā sal ammoniac, sāmudra sea salt, romaka, biḍa—these are the six salts. [7] The cleansing tyāvaka solvent groups are described: sarpavarṇa, kadali plantain, vadhyā, śāla, nīvī, vasu, dālī, śigru, śravaṇā, devī, raṇā, kāca, māvī. [8] The purification method of these cleansing solvents is described: these, mixed with arka-rasa Calotropis juice and vacā Acorus calamus, are purified by the juices of the metals. [9] The purification of rasa mercury in order: boiled with the juices, they do not burn. They are purified by kṣāra alkali and amla acid liquids. [10] The purification of rasa and other groups is described: when processed with sneha and rāga colorants, they are purified seven times. [11] Regarding that: first, purified by kṣāra, sneha, and sattva, then purified by darada and mākṣika. [12] The purification of gold and silver is described: written on thin leaves, with salts, sāra essences, darada, and kṣāra, they are smelted and purified. [13]