Where does “Metallröhrchen” come from?

Metallröhrchen (German) comes from German Metallrohr, from German metall, from Italian metallo, from Spanish metal, from Old Spanish metal, from Old French métal, from Latin metallum, from Ancient Greek μέταλλον — to mine, quarry.

Ancestry of “Metallröhrchen”, step by step

Step	Language	Word	Meaning
1	German	Metallrohr	metal tube, metal pipe
2	German	metall	metal
3	Italian	metallo	metal
4	Spanish	metal	metal
5	Old Spanish	metal	metal
6	Old French	métal	metal material
7	Latin	metallum	metal; precious metals, especially gold or...
8	Ancient Greek	μέταλλον	A mine, quarry, or salt pit; metal
9	Ancient Greek	μέταλλευειν	to mine, quarry

Every word from Ancient Greek μέταλλευειν →Every word from Ancient Greek μέταλλον →Every word from Latin metallum →