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 pitta Garnet pitta The garnet pitta ("Erythropitta granatina") is a species of bird in the Pittidae family. It is found in Brunei, Indonesia, Malaysia, Myanmar, Singapore, and Thailand. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss. The form occurring in the Malaysian state of Sabah has been split as the black-crowned pitta ("Erythropitta ussheri"). The garnet pitta is an insectivore, feeding mainly on ants, wood grubs, cockroaches, and beetles. The Garnet pitta is about 17 cm long. The bird has a black head with a bright blue stripe at the eyebrows and a