They turned out to be perfectly all right, by my standards at least. But they didn't get me close enough!
So I turned to the add on lenses mentioned previously and stuck them on the end of the four stacked macro lenses. . .
So that was a 1x, a 2x, a 4x and a 10x macro add on, plus another cheap add on from before of unspecified strength, and a Raynox, sort of clip on macro lens, the strength of which I can't remember, but must around 10x. It looked a bit bleedin ridiculous, as you can see. The Camera is a Fuji x100 by the way, which has a macro setting but nothing that gets you very close up.
But on a tripod, which is essential with product type shots anyway, the results were pretty much what I wanted. Mind you the beads were almost touching the lens and the camera was casting a shadow which I had to work round. . .
Early days, but I think I can maybe get a style of my own going for slightly more atmospheric supporting shots alongside clearer, more clinical ones for those who want to see details.