The Types segment classifies GAGG Scintillator Crystals according to their compositional and structural variants, each influencing performance metrics and cost structure. Pure GAGG crystals, undoped, serve as a baseline for optical clarity and are typically used where moderate light yield suffices. Ce‑doped GAGG introduces cerium activators, boosting light output and reducing decay time, making them preferred for high‑speed imaging systems. Co‑doped GAGG (e.g., Ce‑Pr or Ce‑Tm) further tailors emission spectra and improves radiation hardness, targeting specialized aerospace and defense applications. Size‑based classifications include small‑format (≤10 mm) crystals, optimized for compact detector modules, and large‑format (>10 mm) units, necessary for high‑energy photon detection in research facilities. Additionally, growth‑method distinctions—such as Czochralski‑grown versus Bridgman‑grown crystals—affect defect density and scalability. Understanding these subtypes clarifies how product differentiation contributes to the overall market, informing supplier positioning and investment decisions.