Premium
Raman spectroscopy in gemmology as seen from a ‘jeweller's’ point of view
Author(s) -
Giarola Marco,
Mariotto Gino,
Barberio Marianna,
Ajò David
Publication year - 2012
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4129
Subject(s) - raman spectroscopy , sapphire , hematite , anatase , diamond , materials science , spectroscopy , nanocrystalline material , characterization (materials science) , fabrication , optics , mineralogy , chemistry , nanotechnology , laser , composite material , physics , medicine , biochemistry , alternative medicine , pathology , photocatalysis , quantum mechanics , catalysis
Some gemstones (diamonds, coloured stones or assembled gems) found in the jewellery commerce, when observed by an optical microscopy or even at naked eye, exhibit unusual characteristics, such as inclusions incorporated at different depths. The investigation by confocal Raman micro‐spectroscopy allowed identification of a blue sapphire and of nanocrystalline anatase in the same surface region of a cut and polished diamond. Moreover, hematite (α‐Fe2O3) inclusions of rectangular shape, embedded at different depths, ranging from a few microns to some tens of microns beneath the gemstone surface, were identified in the coloured stones. Finally, a detailed study of an assembled gem evidenced spectral features that can be put in relation with its fabrication process. Copyright © 2012 John Wiley & Sons, Ltd.