Aim-listed BlueRock Diamonds has agreed nonbinding heads of terms with investment company Teichmann Group to provide capital to deliver the expansion project at the Kareevlei mine, in the Kimberley region. A £1.61-million loan note was agreed with the intention that it will be replaced by a convertible loan note, which will increase the aggregate shareholding of the Teichmann Group concert party to about 49% if converted.