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Gubelin turns microscopes to alexandrite, chrysoberyl

March 28, 2007

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Lucerne, Switzerland—Now that there are more gem-quality alexandrites and chrysoberyls on the market, researchers at the Gubelin Gem Lab have initiated a research project to analyze the stones and their origin, drawing samples from all commercially significant production areas worldwide, the Switzerland-based lab announced.

"Gem-quality alexandrites and chrysoberyls are now available from a large number of sources. This was not always the case," the lab said in its newsletter issued on Tuesday. "Methods of origin determination must keep pace with this increased supply."

The Gubelin newsletter also noted that mineralogist Thomas Armbruster has won the Mineralogical Society of America's Dana Medal for 2008. In addition, the new mineral species "Armbrusterite," a silicate of potassium, sodium and manganese, has received International Mineralogical Society accreditation, and will be named in honor of Armbruster, who teaches at Berne University in Berne, Switzerland. He is the first European researcher to receive the Dana Medal, and several Gubelin lab gemologists are his former students.
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