Computerized three-dimensional X-ray microtomography is capable of revealing the internal structure and some of the material properties of pearls at high resolution, and is thus a more useful tool in pearl testing than conventional X-ray radiography. Differences in transparency to X-rays (radiodensities) can be detected and speed up the process of locating different CaC0₃-polymorphs in the pearl. When combined with micro-Raman spectroscopy, vaterite-containing areas can be identified.
|Number of pages||7|
|Journal||Journal of Gemmology|
|Publication status||Published - 2008|
- cultured pearls
- pearl testing
- Raman spectroscopy