Zirconium

Zirconium, a metallic element often found in connection with silica, commonly in the form of a black powder.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Zirconia Light * Zirknitz, Lake
Ziethen, Johann Joachim von
Zig
Zillerthal
Zimbabye
Zimmermann, Johan Georg von
Zindikites
Zinzendorf
Zion
Zionism
Zirconia Light
Zirconium
Zirknitz, Lake
Ziska, Johann
Zittau
Zlatoust
Zoar
Zöckler, Otto
Zodiac
Zodiacal Light
Zohar
Zoilus