Fig. 5: Optical and petrographic microstructures of the stone samples.

a Single polarized view of WJM-01, (b) orthogonally polarized view of WJM-01, (c) single polarized view of WJM-02, (d) orthogonally polarized view of WJM-02, (e) single polarized view of WJM-03, (f) orthogonally polarized view of WJM-03.