The Jewel Mine of Mercury

[The diamond] is yellow, and by touch, it destroys enemies; it causes vayastambha suspension of aging. It should be identified by the characteristics of being male, female, or neuter. Those that are rounded, full, with a brilliant luster, and heavy are declared to be male; they are devoid of lines and dots. Those with lines and dots and having six facets are considered female. Those with a triangular body are neuter. The preceding ones are superior; the male ones are not [merely] for transmutation but are potent in themselves. They generate bodily luster and bring enjoyment to women. The neuter ones have little potency, are devoid of desire and essence. For women, give the female [diamond]; for the neuter, give the neuter [diamond]. Always use the male [diamond] for all purposes; it is the most powerful. Having taken it, put it into a crucible to be processed. Place it in buffalo [dung/vessel], and cook it on the fire. At night, or at the end of the night, sprinkle it with dog's urine. By doing this for seven nights, it becomes purified. With the decoctions of meghanāda, śamī, śyāmā, śṛṅgī, madana, kodrava, horse gram, cane, vāru, agasti, and sindu-vārī, cook the diamond inside a citron in a dolāyantra swinging apparatus. In this way, purify the diamond. Cook it in a dolāyantra with decoctions of horse gram and kodrava.

Shri 9

The diamond kept in tiger-bulb (vyāghrakanda) is said to be purified after one week. Melt the diamond kept in tiger-bulb, cook it in a puṭa heat chamber for a day and night, then take it out and sprinkle it with horse urine. Sprinkle it with diamond-milk likely a reference to a specific plant latex, and in this way, it is purified and killed calcined. section break Now, the calcination of the Brahmin-class diamond is described. section break