I understand you're looking for an English PDF of the Rasaratnakara (often spelled Rasa Ratnakara). This is an important classical text on Rasashastra (Indian alchemy and iatrochemistry), traditionally attributed to Nagarjuna (c. 8th century CE).
However, I must note:
Many modern books, such as Ayurvedic Pharmacopoeia of India or Indian Materia Medica, cite the Rasaratnakara extensively. By searching for "Rasaratnakara quotations in PDF," you can find extracts that translate specific chapters regarding mercury purification. Rasaratnakara Book In English Pdf
The original Sanskrit Rasaratnakara is massive, divided into multiple Patalas (chapters). It covers:
Subject: Overview, Significance, and Availability of English Translations of Rasaratnakara. I understand you're looking for an English PDF
Date: October 26, 2023
While a pristine, complete Rasaratnakara book in English PDF is elusive, you can find volumes of its translated content if you know where to look. Here are the most common versions in academic circulation: Status: Sanskrit text with Hindi commentary
The most reliable English translations were published by limited-run academic presses (like Chaukhamba Surbharati Prakashan or Motilal Banarsidass) in the 1970s–1990s. These publishers have not released official digital versions. Therefore, most PDFs circulating online are unauthorized scans of copyrighted material, which are frequently taken down by DMCA requests.