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1.- MINERALOGICAL CHARACTERIZATION AND GEMOLOGICAL POSSIBILITIES OF ALEXANDRITE, EMERALD AND PHENAKITE FROM FRANQUEIRA (NW OF SPAIN), THE FIRST SPANISH OCCURRENCE OF THIS MINERAL ASSEMBLAGE
INTERNATIONAL MINERALOGICAL ASSOCIATION; [LOCATION VARIES]; III; INTERNATIONAL, 1994
INTERNATIONAL MINERALOGICAL ASSOCIATION, 16TH GENERAL MEETING; ABSTRACTS
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