fine
Diamonds, but whether they can be worked at a profit has yet to be
proved. Sufficient work has not yet been done on which to form an
opinion.
Outside
the group worked by the De Beers Company, the production of Diamonds
from other mines is small, and not as yet, though we cannot say what
will happen, sufficient to interfere with the practical monopoly
exercised by the De Beers Company, or seriously to compete with them
in the market.