This book is particulerly designed for the glass or glass ceramics researchers in field of Optics and Spectroscopy. The lucid explanation of different concepts and propositions and the methodology adopted marks the subject easier to understand and also more interesting for researchers. this books contains complete interpretation of material preparation , characterisation and applications of various chromium and nickel based borosilicate or boro-phosphate glass ceramics. This book also include very clear explation about Structural (XRD, SEM, EDS, FTIR, RAMAN, ESR and DTA), Optical( UV and PL) and Dielectric Characterization.