Here they are, the second - slightly smaller - pair of seaweed earrings. No pearls on these, just tiny 'barnacles' made by balling the ends of the copper wire. Much daintier!
I have been using my new light tent! It's good, really cheap (£9.99 from ebay including shipping!) and it seems to work! I will try other settings and backgrounds as well, of course, but for now I'm pleased.
Here's another background: