A very rare chalcogen,
that has a fable for Hydrogen.
Which is the reason it is so rare,
Tellurium is elsewhere.

Its abundance in space is very high,
during earth formation it was shy,
and left to a big share,
but in tiny amounts it is there.

It has two allotropes,
and a series of isotopes.
Silver if metallic, or a brown Hydroxide,
in gold ore it tends to hide.

Metallum problematicum,
and aurum paradoxum,
are related to Tellurium,
it was for a long time a curiosum,

as Antimony was expected,
but different properties had been detected,
from Müller von Reichenstein,
for more than one Transylvanian mine,

he was chief inspector and persistent,
and his research significant,
Telluriums name means simply earth,
although it left most of it during its birth.

It is a very modern element and highly desired,
for top photovoltaic applications required,
The demand rapidly increasing,
to lower fossil energy emission releasing.

Together with Cadmium a Tellurid is created,
gained a semiconductor highly motivated.
With traces of zinc it works as x-ray detector,
in the NuSTAR X-ray telescope a main actor.

Very rare with increasing demand,
a reason for humans to do a space expand.
Who knows if space Tellurium mines,
are future newspaper lines.

First declared problematic and undesired,
now it is important and highly desired.
A humble lesson to value all people and things,
who knows what future brings.