This is the second plug of this kind, which I bought. The first cost twice and came from Germany, this is now. Directly from China and half It shows the good piece but also unfortunately, for it seems to be a B-Production. The stone is glued wrong and the margin a little 'dirty', no idea if there are residual adhesive or the stone itself. Maybe just a 'Monday Model'? However, I had already read about such appearance fault elsewhere.