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
Gemstone (database) web application server platform. (VisualWave and VisualWorks are now owned by Cincom.) GemStone played an important sponsorship role in the Smalltalk Industry Council at the time when IBM was backing VisualAge Smalltalk, now owned by Instantiations, Inc. After a major transition, GemStone for Smalltalk continued as "GemStone/S" and various C++ and Java products for scalable, multitier architecture distributed computing systems evolved into the "GemStone/J" product. This in turn gave rise to "GemFire", an early example of a Data Fabric for complex event processing (CEP), event stream processing (ESP), data virtualization, and distributed caching. On May 6, 2010, SpringSource, a division