gems, Arabic mineralogy, early gemology, al-Biruni, al-Kindi, al-Tifaschi

A short comparative study of German and Arabic mineralogical terminology by Johann Georg Koch. The work sets German names for minerals and related natural substances alongside corresponding Arabic terms, with the aim of clarifying their meanings and relationships. It is particularly useful for the history of mineralogy and gemology because Arabic scientific and lapidary literature employed a rich vocabulary for precious stones and minerals that was often inconsistently rendered in European sources. Koch’s comparison provides evidence for how late eighteenth-century European scholars interpreted Arabic mineral names and is a useful source for tracing historical gemstone terminology across the Arabic and German scholarly traditions.