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 Rogers Garnet Rogers Garnet Rogers (born May 1955) is a Canadian folk musician, singer, songwriter and composer. He was born in Hamilton, Ontario with roots in Nova Scotia. He began his professional career working with his brother, folk musician Stan Rogers, and arranging Stan's music. Despite and ever since Stan Rogers' death on June 2, 1983 (just a few weeks before Stan, Garnet and bass player Jim Morison were to tour America), Garnet Rogers has pursued his own career. At first, Garnet had difficulty getting a permit from the U.S. Immigration Service, which only granted one after a campaign on his