I was pretty much saying what acebrawler siad, he was just nice enough to give a good example of it
I still recommend the Bobo switch though. The spec will see you hold a coin in your hand and plainly drop it in the other. They actually see the coin fall and go into the hand, which is good for switching different-looking coins. They won't notice the difference in color because it's just a split-second move. I only use a shuttle pass when working with identical coins.
, please forgive me kraynik
By the way, I know what exodus said to get but if I buy J.B. Bobo's Modern Coin Magic, will it teach me how to do this?
I'm looking through it right now and haven't found anything like the effect you want, but it will definitley teach you every switch, subtlety, and theory you need to pull it off.
EDIT: Yes, I found some tricks like that. "The Ghost of a Coin" and "Silver Extraction" both involve a coin changing to a transparent disc in a spec's hand. Ironically enough, they both you the Bobo switch