A Microscopy and FTIR and PL Spectra Study of Polycrystalline Diamonds from Mengyin Kimberlite Pipes

Figure 2

Optical stereophotographs of the polycrystalline diamonds from the Mengyin kimberlite pipes ((a) and (c) ARPCDs; (b) EFPCDs; (d), (e) and (f) growth lamellae and zigzag strips; (g) screw growth striations; (h) stacked triangular lamellae; (i) irregular pits with parallel striation floors; (j) circular striations and protruding disks; (k) protruding guttate overgrown hillocks; (l) and (m) streak and imbricate structures; (n) and (o) complex intergrowths of anhedral diamonds with abundant interstitial pores and cavities).

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