Spectroscopic Characteristics of Treated-Color Natural Diamonds
Joint Authors
Wang, Meili
Shi, Guanghai
Yuan, Joe C. C.
Han, Wen
Bai, Qing
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-03-07
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
With the increasing availability of treated-color diamonds on the market, their characterization is becoming more and more critical to the jewelry testers and customers.
In this investigation, ten color diamonds treated by irradiation (4 pieces), HPHT (3 pieces), and multiprocess (3 pieces) were examined by spectroscopic methods.
These diamonds are classified to be type Ia according to their FTIR characteristics.
Using microscope and DiamondView, the internal features (such as distinctive color zoning and graphitized inclusions) and complex natural growth structures were observed, which show that the samples are more likely artificially colored natural diamonds.
Through photoluminescence spectroscopy, a combination of optical centers was detected, including N-V0 at 575 nm, N-V− at 637 nm, H3 at 503 nm, H2 at 986 nm, and GR1 at 741 and 744 nm.
Combining with the previous studies, treatment conditions for the studied diamonds were estimated depending on the presence and/or absence of the optical centers.
In addition, the coloration mechanism of the samples (blue, green, and red) during the treatment process was also discussed.
It is suggested that a number of techniques should be combined in order to make a reliable identification for such diamonds.
American Psychological Association (APA)
Wang, Meili& Shi, Guanghai& Yuan, Joe C. C.& Han, Wen& Bai, Qing. 2018. Spectroscopic Characteristics of Treated-Color Natural Diamonds. Journal of Spectroscopy،Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1202614
Modern Language Association (MLA)
Wang, Meili…[et al.]. Spectroscopic Characteristics of Treated-Color Natural Diamonds. Journal of Spectroscopy No. 2018 (2018), pp.1-10.
https://search.emarefa.net/detail/BIM-1202614
American Medical Association (AMA)
Wang, Meili& Shi, Guanghai& Yuan, Joe C. C.& Han, Wen& Bai, Qing. Spectroscopic Characteristics of Treated-Color Natural Diamonds. Journal of Spectroscopy. 2018. Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1202614
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1202614