By swapping all its diamonds out with lab-grown diamonds, Maria Black refrains from cartel pricing, land displacement, unfair labour practices, violence and human rights violations.. 14kt Impact gold which is a mixed alloy consisting of 30% Fairtrade 14kt gold and 70% recycled 14kt gold.. Three lab grown diamonds:,1mm Full cut diamond,1.5mm Full cut diamond,2mm Full cut diamond. Post back closure