Yttrium aluminium garnet (Ce:YAG) is used as a phosphor in cathode ray tubes and white light-emitting diodes, and as a scintillator. YAG for a period was used in jewelry as a diamond and other gemstone simulant. Colored variants and their doping elements include: green (chromium), blue (cobalt), red (manganese), yellow (titanium), purple (neodymium), pink, and orange. As faceted gems they are valued (as synthetics) for their clarity, durability, high refractive index and dispersion. The critical angle of YAG is 33 degrees. YAG cuts like natural garnet, with polishing being performed with alumina or diamond (50,000 or 100,000 grit) on common polishing laps. YAG
Garnet High School Garnet High School Garnet High School, also known as Garnet Career Center and Garnet Adult Education Center, is a historic African American high school in Charleston, West Virginia. It is a three-story, brick structure, constructed in 1928-29 from the plans of the prestigious Charleston architectural firm of Warne, Tucker, Silling and Hutchison, and dedicated December 2–4, 1929. The facade features a limestone arched entrance containing two sets of double doors, transom light, and a limestone tympanum. Garnet was one of three high schools in the Kanawha Valley built for African American students. It closed as a high school in 1956,