Three Theories for the Great Silence, page-126

Yes the endless September in regards primary and secondary deposits never seems to end.

I have always been surprised that Gemfields hasn't made a move on Mustang. It does not make much sense to me to let a competitor in if you could avoid it for next to nothing. The only thing I can come up with is that GEM is more interested in the primary deposits and the low end stone market so does not see MUS as a threat.