This would be a coin with, on one side, a parabolic dish. The other side would be decorated as usual. The die for the coin would have to be made differently (in the us at least) - instead of just lathing it out, they will have to polish the die.

This parabolic currency would be interesting. Different denominations could have different focal lengths.
-- my-nep, Dec 14 2003

Didn't Jesus do a parabolic coin thing when he was kickin' tables 'n chit around in a place of worship?
-- thumbwax, Dec 14 2003


Let's make coins out of chocolate, kid's eat them anyway, why fight it?
-- whatastrangeperson, Dec 14 2003


I always get them confused, would that be coincave or coinvex?
-- 2 fries shy of a happy meal, Dec 14 2003


These might attain a high coinage and then become popular with collectors.
-- FarmerJohn, Dec 14 2003



random, halfbakery