871824.fig.002a
(a)
871824.fig.002b
(b)
871824.fig.002c
(c)
871824.fig.002d
(d)
871824.fig.002e
(e)
871824.fig.002f
(f)
871824.fig.002g
(g)
871824.fig.002h
(h)
871824.fig.002i
(i)
871824.fig.002j
(j)
871824.fig.002k
(k)
871824.fig.002l
(l)
871824.fig.002m
(m)
871824.fig.002n
(n)
871824.fig.002o
(o)
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).