by Farlsborough » Oct 3rd, '06, 01:40
No, you're quite right - UK coins above 10p don't have ridged edges, except the pound... and I really think you'd just never use a £1 coin for magic, it just wouldn't seem right... they're small, for a start, and speaking as a student, you can't afford for them to roll under the door/your bed etc. when you're practicing!
I tend to use 2ps or 10ps when doing UK coin magic. I do also use half dollars - I don't think anyone would suspect you of using a dupe 1/2 dollar any more than a dupe 2p, perhaps less so as they could probably imagine that you only have a limited number of 1/2 dollars.
However, if you want to do magic with "the spectator's coin", best use 2ps. My Coin Unique is the 10p/2p version (available from merlins of wakefield - fantastic quality) simply because hardly any coin tricks are suited to either £1 or 1p pieces - 2ps and 10ps are the easiest to use, so in terms of doing multiple tricks and switching in and out the Coin Unique, I still think this is the better option.