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Herausgeber: 
Deutsche Gemmologische Gesellschaft e.V.
Prof.-Schlossmacher-Str. 1
D-55743 Idar-Oberstein

 

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Für alle Beiträge behält sich die Deutsche Gemmologische Gesellschaft (Deutsche Gesellschaft für Edelsteinkunde) e.V. sämtliche Rechte vor, insbesondere die des Nachdrucks, der Übersetzung in andere Sprachen und der photomechanischen Wiedergabe. Die veröffentlichten Beiträge stellen – soweit namentlich bezeichnet – die Auffassung der Autoren dar und geben nicht notwendig die Meinung von Herausgeber und Schriftleitung wieder. (Content of this journal may not be reproduced in any form without the permission of the German Gemmological Association. Opinions expressed do not necessarily reflect the views of the Association.)

Cut opals from Honduras (Erandique, Departamento Lempira). Width of the left stone: 20 mm.

Occurrences of opal in the Central American country Honduras are already known since the mid-19th century. Opals with and without playof-colour are found in volcanic rocks, especially in mostly strongly weathered andesites and in ignimbrites. Generally, white and light opals, partly with dendrites, brown to yellowish and dark matrix opals can be differentiated. The occurrences are located in the Departamento Lempira in the Region of Erandique. A new occurrence exists in the Departamento Ocotepeque, west of Lempira.

This article deals with the macro- to microscopical characterization of the different opal types from Honduras, their physical and chemical properties and micro-structures.

 

This article was published in German with an English abstract and English figure captions in our Journal. DGemG-members have access to the article in our online-archive.

 

Authors

Dr. Ulrich Henn, DGemG,
Stefan Müller, M.Sc., DSEF,
Qi Wang, M.FA., FGG, EG and
Anaité Seibt, ALS Opalos, La Ceiba, Honduras

 

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