A generalised cross section across the Chiadzwa placer diamond deposit area. 1. Granite basement; 2. Diamond-bearing Umkondo basal conglomerate and arkose; 3. Diamond-rich eluvium shed from the conglomerate; 4. Diamond-rich alluvium; 5. Lower limestone horizon; 6. Lower quartzite horizon; 7. Upper limestone horizon; 8. Upper quartzite horizon.