district
during the winter of 1909-10: a fine blue-white stone of 90 carats and
a very good one of 65-3/4 carats at Baboon Island, and one of 35 carats
on the Barkly West Commonage.
The
diamond chimneys are usually somewhat funnel-shaped at the surface, so
that many of the surface locations on the edge of them ran out with
depth.