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
The Garnet Bracelet had a real basis, judging by Kuprin's October 15 letter to Fyodor Batyushkov. "What I do today is polish The Garnet Bracelet. This is - remember it? - the sad story of a minor telegraph clerk named P.P. Zheltikov who so hopelessly, touchingly and selflessly fell in love with Lyubimov's wife (D.D. is now a Vilno governor)... But the progress is difficult." "Perhaps that is because I am musically ignorant. Besides, this high society language!” he complained in the November 21 letter. By December 3 the work hasn't been finished yet. "I'd rather not haste with this piece which is