"There are even treatises by authorities, whom at least I shall not name, where they describe the ways in which they dye rock-crystals the color of emerald or other transparent stones, or make sardonyx from sard, and similarly various gems from others. Indeed, there is no fraud in life that is more profitable."

While no such treatise is preserved, traces of such texts are discernible in the so-called Stockholm papyrus, which gave numerous recipes to make imitation gemstones. The papyrus is usually classified as alchemical in nature, highlighting the links between medicine, gem making, and alchemy.

https://link.springer.com/chapter/10.100...-76398-4_2

"This paper historicizes a constellation of interrelated ideas regarding the chymical principles as they developed and became resilient fixtures within a major chymical tradition. Focusing primarily on German chymists, several of whom have eluded sustained historical interest, it explores how experimental analysis was generally thought to produce sensible chymical principles, often conceived as principiata: bodies produced by combining or mixing fundamental elements or principles."

https://link.springer.com/chapter/10.100...-76398-4_4

" An alchemical tradition going back to the High Middle Ages had already used a similar approach to the reduction to the pristine state to argue explicitly against a theory of mixture that had been championed by Thomas Aquinas in the second half of the thirteenth century. Basing himself largely on Aristotle’s De generatione et corruptione, Thomas interpreted a famous passage of the Stagirite’s work, “mixture is the union of the altered miscibles” (328b22) in a very strong sense, where “union” was taken to mean that the four elements undergoing mixture lost their actual being and were reduced to the four elementary qualities, hot, cold, wet, and dry, acting on the undifferentiated Aristotelian prime matter."

https://link.springer.com/chapter/10.100...-76398-4_1

"Paracelsus is often lauded for having created a new disciplinary identity for alchemy by basing it on the twin operations of analysis and synthesis. Indeed, his neologism for the field, Spagyria, is often said to express this pairing by embodying the Greek terms for decompounding and compounding (σπάν and ἀγείρειν). The present article disputes both this etymological claim and the underlying belief that Paracelsus had an interest in synthesis that paralleled his very strong promotion of analysis (Scheidung)."

https://link.springer.com/chapter/10.100...-76398-4_3

"Although it has been documented that alchemical treatises were translated into Latin, beginning at least in the middle of the 12th century, the romances of Chrétien de Troyes have not been connected with alchemical lore. This study suggests that Chrétien’s first Arthurian romance, Erec et Enide, is an alchemical tour de force, and the the “tel chose”, mentioned twice in the prologue, is the key to an alchemical understanding of Erec et Enide."

https://www.medievalists.net/2014/02/the...e-romance/

"Beethoven, I argue, works musically (as do many of the representatives of the “Goethezeit”) in a way analogous to what emerged psychologically in the medieval
practice of alchemy"

David Michael Suggate
Doctor of Philosophy - PhD, University of Otago
University of Otago
2022

Full Text.


https://ourarchive.otago.ac.nz/esploro/o...9672201891

Epub at Everand.

I have no idea about the copyright status of this text.

https://fr.everand.com/author/818540417/...d-Bacstrom

"Shivalinga can be termed the elusive philosopher’s stone and has a distinctive spherical shape,' Yogiraj Siddhanath said…. the science of mercury solidification, a technique that Europe and Arabia so dearly wanted but could not comprehend, has been known to India for 7,000 years, since the time of the Indo-Saraswati civilisation."

https://www.siddhanath-india.org/alchemi...-shivaling

"Rasaratna Samucchaya is a significant Sanskrit treatise on Indian alchemy authored by Rasa Vagbhata in the 13th century. This text serves as a comprehensive guide to the field of Rasashastra, emphasizing the philosophical and practical aspects of herbo-mineral formulations."

https://www.wisdomlib.org/science/journa...85437.html

A Corpus of Middle English Alchemical Poetry (Critical Editions and Studies)
By Anke Timmermann

Full text.

https://www.researchgate.net/publication..._Knowledge