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 Crow often found in garnets. The word "Crow" was attached for its phonetic resonance. A further consideration in creating the band name was the enduring image left behind when it is translated to the eerie in Japanese. Since inception, the four-person line-up of Garnet Crow has remained constant. The two female and two male band consists of lead vocalist , keyboardists and , and guitarist . Furui is the band leader, but members are introduced in official sources with vocalist Nakamura receiving top billing. In 1999, the four members of what was to become Garnet Crow collaborated on the creation of