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<p>"On the 'Marmarosch diamonds' or exceptionally clear and sharp rock crystals found near Nagyag, Hungary, with remarks on similar crystals from elsewhere, descriptions of typical specimens and occurrence, the collecting &amp; marketing of same, and with an anecdote on a famous large 'diamond' that belonged to Dr. Gottfried Christoph Beireis of Helmstadt which was examined by Goethe but doubted by him to be a true diamond."--Gemology by J. Sinkankas, entry no. 4045.
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<br>Subjects: Quartz crystals</div>
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Lorinser, Gustav</div>
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