%0 journal article
%@ 0022-1252
%A Schlueter, J., Lohmann, M., Metge, j., Reime, B.

%D 2005
%J The Journal of Gemmology
%N 7-8
%P 401-406 

%T Diffraction Enhanced Imaging, a new X-ray method for detecting internal pearl structures
%U 
7-8 
%X The X-ray based Diffraction Enhanced Imaging method (DEI) has been adopted for pearl examination. Pearls of different origin have been tested with this new method. DEI images - especially of large pearls - give more accentuated internal growth features in comparison with usual X-radiographs and show structures which could not be made visible with conventional methods. The DEI method furthermore offers a tool for the separation of larger tissue-nucleated cultured pearls from natural freshwater pearls if conventional X-ray methods fail.