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"Aus dem XXXII. Bande, S.3, des Jahrganges 1858 der Sitzungsbericht​e der mathem.-naturw. Classe der kaiserlichen Akademie der Wissenschaften besonders abgedruckt"<div><br></div><div>"Haidinger's refutation of the claim by Clemens Stephan Dupoisat of France that a nearly 820 carat brilliant cut stone is diamond.  Haidinger's test results reveal it to be a faintly-blue topaz."-​-​Gemology by J. Sinkankas, entry no. 2672.<br></div><div><br></div><div>German text with French footnotes.</div>
<br>Subjects: Diamonds; Topaz; Precious stones--Testing</div>
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Haidinger, Wilhelm Karl, RItter von, 1795-1871</div>
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