Titanium
zirconium or zircon
Zirconium was discovered by Martin Heinrich Klaproth (Germany) in 1789, studying the mineral zircon (zirconium silicate); Klaproth obtained also the zirconium dioxide . The metal zirconium was separated in 1824 by Berzelius.
Martin Heinrich Klaproth in 1789, as an oxide. In 1841 Eugene Melchior Peligot isolated uranium as pure metal.
You may be referring to Klaproth's discoveries of Uranium and Zirconium in 1789. He was also credited as being the discoverer of Titanium in 1791, although the mineralogist William Gregor was the first to isolate this element earlier that same year.
Martin Heinrich Klaproth in 1789, as an oxide in the mineral pitchblende. In 1841 Eugene Melchior Peligot isolated uranium as a pure metal.
Martin Heinrich Klaproth discovered a new mineral containing uranium in 1789. Eugen Peligot isolated uranium as a pure metal in 1841.
Zirconium was discovered by Martin Heinrich Klaproth in 1789.
Zirconium was discovered by Martin Heinrich Klaproth in 1789.
Martin Heinrich Klaproth, in 1789.
In pitchblende from Joachimow (now in Czech Republic), 1789
Martin Heinrich Klaproth in 1789 prepared an oxide of uranium (confusion with the pure element). In 1841 Eugène-Melchior Péligot isolated the first uranium metal.
Zirconium was discovered by Martin Heinrich Klaproth in 1789.