synthetic beryl, emerald, synthetic beryl, gems

The Lennix synthetic emerald, currently n~anufacturedin France, is a dark green, moderately transparent to translucent material grown by flux fusion. With the microscope, zones of lighter and darker green are evident. For the most part, the gemological properties of this synthetic emerald overlap those of natural einer-aids, although the low refractive-index and specific-gravity values are good indi-cators that this material is synthetic. The presence of wispy veil" inclusions pro-vides conclusive proof of synthetic origin, as do the chemical analyses, infrared transmission spectra, and cathodo-luminescence."