Alchemist’s supposedly possessed a secret water, a universal dissolving liquid called alkahest that was said to be beneficial in creating alchemy gemstones which were theoretically colored by VITRIOL. Notice the similarity of the words alkahest, and alkaline. My research also indicates that some gemstones are made from corundum. Silica is said to dissolve in alkaline water. When silica is heated with carbon above 1700 degrees celsius it form carborundum. What is the difference between corundum and carborundum?
the difference between corundum and carborundum
is that corundum is a extremely hard mineral, a form of aluminum oxide that occurs in the form of the gemstones sapphire and ruby. carborundum is crystals of silicon carbide used as an abrasive.
Alchemy and the green lion book by Steven School. Alchemy And The Green Lion Book

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