Topic
Tanzanite
About: Tanzanite is a research topic. Over the lifetime, 42 publications have been published within this topic receiving 338 citations. The topic is also known as: Tanjeloffite.
Papers
TL;DR: The authors examined the immediate fallout from the Wall Street Journal article and the subsequent effects of anti-terrorist rhetoric on the tanzanite industry, and explored the origins of the conflict gem discourse and the political movement that has taken shape over the past decade to reform gemstone mining.
51 citations
Dissertation•
1 Dec 2006
26 citations
TL;DR: In this paper, the Tanzanian government built a wall around tanzanite mines to control smuggling, which had negative impacts on production, while resource nationalist policies targeting large scale mining also affect artisanal mining.
24 citations
TL;DR: In this article, the vibrational properties of submillimetre size inclusions of unusual habit in a commercial tanzanite gemstone were investigated by confocal Raman microspectroscopy with the aim of probing both their chemical composition and crystal structure.
Abstract: The vibrational properties of submillimetre size inclusions of unusual habit in a commercial tanzanite gemstone were investigated by confocal Raman microspectroscopy with the aim of probing both their chemical composition and crystal structure. Highly contrasted Raman spectra were recorded in confocal conditions from several inclusions incorporated at different depths, ranging between a few microns to some tens of microns beneath the gemstone surface. The observed spectral features were identified as specific markers of hematite (α-Fe2O3). Their unambiguous assignment has been inferred by comparing our experimental findings with the literature data recorded either in single crystals of hematite or in other iron oxides and oxyhydroxides. Our results rule out the presence of any pseudomorphic variety of hematite in the investigated gemstone, while confocal micro-Raman spectroscopy definitively proved itself as a very reliable, relatively costless and noninvasive tool for unambiguous identification of subsurface regions of gemstones. Copyright © 2011 John Wiley & Sons, Ltd.
24 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 3 |
| 2020 | 1 |
| 2019 | 3 |
| 2018 | 2 |
| 2017 | 1 |
| 2016 | 3 |