Figure 8. The RTX (top row) and μ-CT (bottom row) images for a non-bead-cultured pearl (sample 0668689302). The RTX images show the whole thickness of the pearl in each orientation, while each μ-CT image shows a micron-thin slice of the structure in each of the directions. This demonstrates the difference between the two types of X-ray techniques.
Figure 12. RTX (top row) and μ-CT (bottom row) images of non-bead-cultured pearl sample no. 0668688502 in two orientations. The RTX images show the whole thickness of the pearl in each orientation, while each μ-CT image shows a micron-thin slice of the structure in each of the directions. The thickest orientation was not reproduced here, as the overlapping void features do not provide much insight when examining such multi-structured pearls.
Figure 10. The RTX (top row) and μ-CT (bottom row) images for non-bead-cultured pearl sample 100307378817. The RTX images show the whole thickness of the pearl in each orientation, while each μ-CT image shows a micron-thin slice of the structure in each of the directions.
Figure 3. Containers of phytoplankton ready for consumption by hatchery mollusks of various ages. Photo by Nicholas Sturman.
Figure 9. A non-bead-cultured pearl (sample no. 100307378817) still in the light brown pearl sac before removal from its host. Again, the pearl is positioned within the gonad region and away from the mantle. Photo by Nicholas Sturman.
Figure 6. RTX images of the pearl in figure 5 show a fairly large bead nucleus with some banding in one area. The lower-contrast image on the left shows the outline of the bead more clearly. The higher-contrast image on the right shows both the bead’s outline and the banding within the bead more clearly.
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