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Alexandrite

Tsarstone collectors guide

GemResearch Swisslab

Determination of the authenticity and country of origin of rubies, sapphires and other rare colour gemstones. Also offers gemstone reports and inscriptions.

GRS Gemresearch Swisslab Ltd
Homepage Address Contact
www.gemresearch.ch/ P.O. Box 4028
Canton
Lucerne 6002
Switzerland
N: Dr. A. Peretti
T: 41-210-31-31
F: 41-210-31-34
E: adolf@peretti.ch

Private gemological research company focused on the characterization of high-quality gems from newly opened mines.

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