@misc{schlueter_diffraction_enhanced_2005, 
author={Schlueter, J., Lohmann, M., Metge, j., Reime, B.},
title={Diffraction Enhanced Imaging, a new X-ray method for detecting internal pearl structures},
year={2005},
howpublished = {journal article},
abstract = {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.},
note = {Schlueter, J.; Lohmann, M.; Metge, j.; Reime, B.: Diffraction Enhanced Imaging, a new X-ray method for detecting internal pearl structures. The Journal of Gemmology. 2005. vol. 29, no. 7-8, 401-406.}}