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
Henry Garnet had reached "a stage of desperation". The two met again in July at Fremland in [[Essex]]. Garnet told Catesby that he "wished him to look what he did if he intended anything. That he must first look to the lawfulness of the act itself, and then he must not have so little regard of Innocents that he spare not friends and necessary persons for the Commonwealth." When Catesby offered to tell the priest more, Garnet declined: "I told him what charge we all had of quietness and to procure the like in others." Garnet also spoke with [[William Parker, 4th