You'd think Gosho'd make up his mind about that charm, eh?
Volume 1 cover. The charm is light blue and black with a white clover, stem (not visible here) at the bottom right leaf indent.
Volume 3 cover. Charm is green (same shade as the back of the playing cards) and black, white clover with a tiny, tiny stem protruding from the bottom right leaf dent (barely visible here).
Volume 16 of Conan, black and white. Stem protrudes from between the middle section of the leaf (with the indent)and the bottom of the right leaf.
A very bad quality pic from movie number 3, 'The Last Wizard of the Century', the clover is black and vaguely blue, no stem.
Calender 2002, May and June. Clover is now a design consisted of four heart shapes pointing inwards with no stem on black and blue.