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 Peak users. Finally, in 1974 at the age of 65, Neave achieved his dream when he summited Garnet Peak and he named the mountain for the small garnets he found in rock formations near the summit. Neave died in 1988 and Mount Hugh Neave, just north of Garnet Peak, was named the following year in recognition of his climbs in northern Wells Gray Park. Later in 1988, members of the Kamloops Mountaineering Club carried his ashes to the top of Garnet Peak. Fewer than 100 people have climbed Garnet Peak since 1974. It is not a difficult mountain to climb because