Determination of demantoid garnet origin by chemical fingerprinting

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Marco E. Ciriotti
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Determination of demantoid garnet origin by chemical fingerprinting

Messaggio da Marco E. Ciriotti » mer 29 mag, 2019 12:02

Referenza:
▪ Schwarzinger, C. (2019): Determination of demantoid garnet origin by chemical fingerprinting. Monatshefte für Chemie, 150, 907-912.

Abstract:
Demantoid garnets are among the most valuable gemstones in the world and their prices vary depending on the location they are found. Thus, a reference set of stones with known origins was assembled and their chemical composition analyzed with laser ablation—inductively coupled plasma mass spectrometry. It was shown that the three major sources, Russia, Namibia, and Madagascar, could be distinguished by using a plot of the manganese/titanium ratio versus the sum of chromium and vanadium in combination with the aluminum content. Even within Russia it was possible to separate some deposits using elemental composition despite some stones having color zones and therefore a varying concentration of some elements.

NdR: Per gli interessati l'articolo è open source e pertanto scaricabile al seguente indirizzo web: https://link.springer.com/article/10.10 ... _706_150_5
Marco E. Ciriotti

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Roberto Bracco
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Re: Determination of demantoid garnet origin by chemical fingerprinting

Messaggio da Roberto Bracco » mer 29 mag, 2019 12:32

Interessante, peccato non abbiano studiato anche i campioni malenchi che, per quanto non importanti a livello mondiale come gemme, sono sicuramente i più pregiati come campioni su matrice!
Roberto Bracco - AMI Liguria

Perché seguire il calcio, quando accanto c'è lo scandio e poco più in là il vanadio?

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