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The Rasaratna Samuccaya of Vāgbhat states that a gold leaf of the weight of one karshā is to be smeared with Saimndhava salt and placed between two' earthen saucers and heated on a charcoal fire for an hour and a half, when its true colour will come out. 1; li..."
Gold can be reduced to ashes with the aid of the ashes of mercury, through the agency of the roots of plant, and with Sulphur. The first process is the best, the second medium and the third lowest or least.?
Gold leaves, pierced with holes and coated with a pastle of lemon juice and the ashes of mercury and roasted ten times are thereby killed. 3
Raupyaṁ (Silver) Rupyaṁ or Raupyaṁ (Silver) has been used in various chemical and medicinal processes as described in the Suvarna-Raupya-Siddhi-śāstra. Besides artificial Silver-making processes have been dealt with in this work. 4
The Rasārnava mentions two kinds of silver, viz. white and black. The one which is heavy, smooth, soft, and white is best.' The Rasaratna Samuccaya refers to three kinds of silver, viz. Sahaja, Khanija and kstrima, Sahaja is the best one, while kstrima is the lowest type.
According to the Rasārņava, silver can be purified by melting it with lead and borax and quench it with the oil of jațāmāsı three times.?
The Rasaratna Samuccaya of Vāgbhat describes the following processes for the purification of Siver.
2. SRSS., Ch. 7.8 . 1. Karşapramāņam tu sarāvaruddham şaddhātuyuktam /
Angārasamsthaṁ praharārdhamānam dhmātena tatsyānnau
pūrņavataṇam /, RS. 5/12. 2. Lohānāṁ māraṇaḥ śreştham sarveşām rasabhasmana /
Mūlibhirmadhyamam prāhuḥ kaņişthaṁ gamdhakādibhiḥ II ,
RS., 5.1/13. 3. Kștvā Kaņțakavedhyāni svarṇapatrāņi lepayet / "
Lumgāmbabhasmasūtena mriyate daśabhiḥ puțaiḥ 11 , ..
RS. 5/14. 4. See the section on the silver making process, 3rd. Ch. 5. Suklañca tārakļşņañca dvividham rajataṁ priye / guru snigdham
mędu śvetam tāramuttamamişyate ll ..
Rasārņava 7/103. 6. Sahajaṁ khanisañjātaṁ ca kṛtrimam trividham matam | Rajatan
pūrvapūrvam hi Svagunairuttarottaram Jl
Rs. 5/21. 7. Nāgena kşārarājena drāvitam śuddhimicchati Tāram triväram
nikşiptam piśācı tailamadhyatah. Rasārņava 7/104.
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