  We present the results of work on a hybrid material composed of a tellurite
glass rod doped with nanodiamonds containing nitrogen-vacancy-nitrogen and
paramagnetic nitrogen-vacancy color centers. The reported results include
details on tellurite glass and cane fabrication, confocal and wide-field
imaging of the nanodiamond distribution in their volume, as well as on the
spectroscopic characterization of their fluorescence and Optically Detected
Magnetic Resonance measurements of magnetic fields and temperatures. Magnetic
fields up to 50 G were examined with a sensitivity of 10$^{-5}$ T Hz$^{-1/2}$
whereas temperature measurements were simultaneously performed with a
sensitivity of 74 kHz K$^{-1}$ within the 8 Kelvin range at room temperature.
In that way, we demonstrate the suitability of such systems for fiber magneto-
and thermometry with a reasonable performance already in the form of glass
rods. At the same time, the rods constitute an interesting starting point for
further processing into photonic components such as microstructured fibers or
fiber tapers for the realization of specialized sensing modalities.
