The colored glasses are obtained with the formation of significant
NPs when silver or copper aggregate by aging on temperature and
annealing time. The influence of these NPs are highlighted by UV/
Visible spectrophotometry because of their typical spectral signatures
[1,31]. The determination of a typical radius is necessary to evaluate
the SPR influence. This parameter was determined by both coupled
methods TEM and XRD for the structural analysis. TEM pictures
have shown few big NPs in the copper glass case with a radius in