Johann Kunckel and Gold Ruby Glass

[Paul Ferguson]

"Johann Kunckel, renowned for his mastery in the elusive alchemical art of glassmaking, achieved a feat that set the courts of Europe ablaze with desire: the creation of the gold ruby glass, a substance as close to the coveted glow of a carbuncle as man could conjure."

https://trendydigests.com/2024/04/19/red...terpieces/