Figure 1
From: Characterizing pearls structures using X-ray phase-contrast and neutron imaging: a pilot study

(From left to right) the natural pearl NP-22, the bead saltwater pearl CP-17 and the non-bead freshwater cultured pearl CP-21.
From: Characterizing pearls structures using X-ray phase-contrast and neutron imaging: a pilot study

(From left to right) the natural pearl NP-22, the bead saltwater pearl CP-17 and the non-bead freshwater cultured pearl CP-21.