Edward J. Gübelin
Highly Influential Citations7
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The Lennix synthetic emerald, currently n~anufactured in France, is a dark green, moderately transparent to translucent material grown by flux fusion. With the microscope, zones of lighter and darker… Continue Reading
In addition t o the relatively recent discovery o f significant amounts of emerald, aquamarine, and ruby, Pakistan has also begun to produce fine gem-quaii t y pink topaz. In a small hillock of… Continue Reading
from secondary deposits in the Ratnapura area in the second half of the 1990s increases the number of gems containing essential boron from this island (tourmaline, dumortierite, boron-rich… Continue Reading