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Fritsch, E. (2021) Revealing the Formation Secrets of the Matryoshka Diamond. J. Gemmol. 37 528–533.
Added by: Richard Baschera (2021-09-27 08:31:54) Last edited by: Richard Baschera (2021-09-27 08:58:21) |
| Type de référence: Article DOI: 10.15506/JoG.2021.37.5.528 Numéro d'identification (ISBN etc.): 1355-4565 Clé BibTeX: Fritsch2021 Voir tous les détails bibliographiques  |
Catégories: MIOPS Mots-clés: dissolution, growth Créateurs: Fritsch Collection: J. Gemmol. |
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| Liens URLs http://www.webofsc ... OS:000681489000017 |
| Résumé |
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The so-called Matryoshka diamond from Siberia, Russia, consists of a 0.62 ct pale green specimen that contains a small, flat diamond crystal which can freely move within an internal cavity in the stone. The cavity is connected to the surface by two small channels. This rare specimen is here proposed to result from an unusual succession of layered growth (octahedral-fibrous-octahedral), which was followed by the etching of two surface-reaching dislocations that penetrated the fibrous layer, allowing circulating etch solutions to entirely resorb the fibrous portion of the crystal. This freed the core (composed of octahedral growth) so that it became loose inside the outer octahedral growth layer of the crystal. This scenario is supported by some lesser-known facts about diamond growth and dissolution, as described here. At least two similar diamonds have been described in the literature previously, so the Matryoshka diamond is not unique. (C) 2021 Gem-A (The Gemmological Association of Great Britain)
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Place: London Publisher: Gemmological Assoc Great Britain WOS:000681489000017
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