(Schmöllnitz/Smolnik, now Slovakia, 1748 - Wien
Ruprecht graduated from the
Mining Academy of
in 1763. He was appointed to be professor chemistry and
metallurgy in 1779. He was among the first who regarded
the so-called "soils" as complex substances, and
tried to show this by experiments. He succeeded in melting
platinum first and he had a part in the discovery of tellurium.